server-core/app/infrastructure/models.py

# -*- coding: utf-8 -*-
"""SQLAlchemy ORM 模型（auth/RBAC 域）+ Pydantic 请求/响应模型。

- ORM 模型对应 SQLite 各表（users/roles/permissions/organizations/regions/
  sessions/audit_logs/agents）。
- Pydantic 模型与 PineAgents 主后端 ``src/pineagents/app/routers/auth.py``
  中的请求/响应模型一一对应，转发层透传时不会丢字段。
"""
from __future__ import annotations

from pydantic import BaseModel, Field
from sqlalchemy import (
    Boolean,
    Float,
    ForeignKey,
    Integer,
    PrimaryKeyConstraint,
    String,
    Text,
)
from sqlalchemy.orm import Mapped, mapped_column

from .db import Base


# ===========================================================================
# SQLAlchemy ORM 模型
# ===========================================================================

class User(Base):
    __tablename__ = "users"
    __table_args__ = {"sqlite_autoincrement": True}

    id: Mapped[str] = mapped_column(String, primary_key=True)
    username: Mapped[str] = mapped_column(String, unique=True, nullable=False)
    password_hash: Mapped[str] = mapped_column(String, nullable=False)
    password_salt: Mapped[str] = mapped_column(String, nullable=False)
    # 统一登录：微信 openid（登录即建 opc_member 身份）；phone 与 username（手机号）对齐
    wx_openid: Mapped[str] = mapped_column(String, default="", index=True)       # 公众号/网页开放平台
    wx_unionid: Mapped[str] = mapped_column(String, default="", index=True)      # 微信 unionid(跨应用统一)
    wx_mini_openid: Mapped[str] = mapped_column(String, default="", index=True)  # 小程序 openid(与网页不同)
    phone: Mapped[str] = mapped_column(String, default="")
    email: Mapped[str] = mapped_column(String, default="")
    nickname: Mapped[str] = mapped_column(String, default="")
    account: Mapped[str] = mapped_column(String, default="")
    company: Mapped[str] = mapped_column(String, default="")
    room: Mapped[str] = mapped_column(String, default="")
    avatar: Mapped[str] = mapped_column(String, default="")
    company_avatar: Mapped[str] = mapped_column(String, default="")
    gender: Mapped[str] = mapped_column(String, default="")          # male|female|unknown
    birthday: Mapped[str] = mapped_column(String, default="")        # YYYY-MM-DD
    # 用户详细资料（参考入园申请表 §一 申请人信息）
    id_card: Mapped[str] = mapped_column(String, default="")         # 身份证号
    ethnicity: Mapped[str] = mapped_column(String, default="")       # 民族
    grad_school_major: Mapped[str] = mapped_column(String, default="")  # 毕业院校及专业
    grad_time: Mapped[str] = mapped_column(String, default="")         # 毕业时间
    # RBAC
    role: Mapped[str] = mapped_column(String, default="opc_member")  # 业务角色
    sub_role: Mapped[str] = mapped_column(String, nullable=True)     # 政务级/运营方内部
    org_id: Mapped[str | None] = mapped_column(ForeignKey("organizations.id"), nullable=True)
    region_id: Mapped[str | None] = mapped_column(ForeignKey("regions.id"), nullable=True)
    status: Mapped[str] = mapped_column(String, default="active")    # active | disabled
    token_version: Mapped[int] = mapped_column(Integer, default=0)   # revoke-all 递增
    # ── 来源与登录跟踪（全局用户统一，记录准确来源） ──
    source: Mapped[str] = mapped_column(String, default="")          # mini_program|web|desktop|park|admin|seed|wx|phone|unknown
    auth_type: Mapped[str] = mapped_column(String, default="")       # password|phone|wx_openid|admin
    register_ip: Mapped[str] = mapped_column(String, default="")
    last_login_ip: Mapped[str] = mapped_column(String, default="")
    last_login_at: Mapped[str] = mapped_column(String, default="")
    # ── 算力（引擎用户镜像，全局一致） ──
    compute_provisioned: Mapped[bool] = mapped_column(Boolean, default=False)  # 是否已在算力引擎建号
    compute_username: Mapped[str] = mapped_column(String, default="")           # 引擎用户名(= username)
    compute_quota: Mapped[int] = mapped_column(Integer, default=0)              # 缓存引擎可用额度
    compute_used_quota: Mapped[int] = mapped_column(Integer, default=0)         # 缓存引擎已用额度
    # ── 状态与身份分类 ──
    certification_status: Mapped[str] = mapped_column(String, default="uncertified")  # uncertified|pending|certified|rejected
    certification_time: Mapped[str] = mapped_column(String, default="")
    affiliation: Mapped[str] = mapped_column(String, default="independent")     # independent:独立OPC | park:所属园区
    park_id: Mapped[str] = mapped_column(String, default="")                    # 所属园区(id)
    park_name: Mapped[str] = mapped_column(String, default="")                  # 所属园区(名)
    park_company_id: Mapped[str | None] = mapped_column(String, nullable=True)  # 所属园区企业(id)，成员归属一家企业
    account_type: Mapped[str] = mapped_column(String, default="opc_default")    # opc_default|park_staff|platform_staff|provider|enterprise
    # 小程序/网页「报名资料」字段（现状标签 + 关注主题 JSON）
    opc_status: Mapped[str] = mapped_column(String, default="")
    topics: Mapped[str] = mapped_column(String, default="")
    created_at: Mapped[str] = mapped_column(String, default="")
    updated_at: Mapped[str] = mapped_column(String, default="")


class Role(Base):
    __tablename__ = "roles"

    id: Mapped[str] = mapped_column(String, primary_key=True)   # 角色码
    name: Mapped[str] = mapped_column(String, nullable=False)    # 展示名
    scope_type: Mapped[str] = mapped_column(String, default="business")  # business|operator-internal|government-level
    description: Mapped[str] = mapped_column(String, default="")


class Permission(Base):
    __tablename__ = "permissions"

    id: Mapped[str] = mapped_column(String, primary_key=True)    # 权限码 menu:xx / action:xx
    name: Mapped[str] = mapped_column(String, nullable=False)
    category: Mapped[str] = mapped_column(String, default="action")  # menu | action
    module: Mapped[str] = mapped_column(String, default="")       # admin|government|...
    description: Mapped[str] = mapped_column(String, default="")


class RolePermission(Base):
    __tablename__ = "role_permissions"

    role_id: Mapped[str] = mapped_column(
        ForeignKey("roles.id", ondelete="CASCADE"), primary_key=True,
    )
    permission_id: Mapped[str] = mapped_column(
        ForeignKey("permissions.id", ondelete="CASCADE"), primary_key=True,
    )


class Organization(Base):
    __tablename__ = "organizations"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    name: Mapped[str] = mapped_column(String, nullable=False)
    type: Mapped[str] = mapped_column(String, default="enterprise")  # enterprise|carrier|provider
    region_id: Mapped[str | None] = mapped_column(ForeignKey("regions.id"), nullable=True)
    parent_id: Mapped[str | None] = mapped_column(ForeignKey("organizations.id"), nullable=True)
    status: Mapped[str] = mapped_column(String, default="active")
    created_at: Mapped[str] = mapped_column(String, default="")


class OrganizationMember(Base):
    """机构成员（机构主账号 + 机构内子账号）：一个账号可挂多个机构。"""

    __tablename__ = "organization_members"

    org_id: Mapped[str] = mapped_column(
        ForeignKey("organizations.id", ondelete="CASCADE"), primary_key=True,
    )
    user_id: Mapped[str] = mapped_column(
        ForeignKey("users.id", ondelete="CASCADE"), primary_key=True,
    )
    role: Mapped[str] = mapped_column(String, default="member")  # admin/finance/publisher/service_executor/service_deliverer/clerk/...
    is_admin: Mapped[bool] = mapped_column(Boolean, default=False)  # 机构主账号/管理员
    status: Mapped[str] = mapped_column(String, default="active")
    joined_at: Mapped[str] = mapped_column(String, default="")


class Region(Base):
    __tablename__ = "regions"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    name: Mapped[str] = mapped_column(String, nullable=False)
    level: Mapped[str] = mapped_column(String, default="district")  # province|city|district
    parent_id: Mapped[str | None] = mapped_column(ForeignKey("regions.id"), nullable=True)
    created_at: Mapped[str] = mapped_column(String, default="")


class SessionToken(Base):
    __tablename__ = "sessions"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    jti: Mapped[str] = mapped_column(String, unique=True, nullable=False)
    token: Mapped[str] = mapped_column(String, default="")  # 完整 JWT（调试用）
    user_id: Mapped[str] = mapped_column(ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
    username: Mapped[str] = mapped_column(String, default="")
    created_at: Mapped[str] = mapped_column(String, default="")
    expires_at: Mapped[str] = mapped_column(String, default="")
    revoked: Mapped[bool] = mapped_column(Boolean, default=False)


class AuditLog(Base):
    __tablename__ = "audit_logs"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    user_id: Mapped[str | None] = mapped_column(ForeignKey("users.id"), nullable=True)
    action: Mapped[str] = mapped_column(String, default="")   # login|role.assign|data.view|...
    resource: Mapped[str] = mapped_column(String, default="")  # user|role|enterprise|region|...
    resource_id: Mapped[str] = mapped_column(String, default="")
    detail: Mapped[str] = mapped_column(Text, default="")
    ip: Mapped[str] = mapped_column(String, default="")
    created_at: Mapped[str] = mapped_column(String, default="")


class Agent(Base):
    __tablename__ = "agents"
    # id + user_id + port 复合主键：每个用户在每个端口持有独立的默认/QA 智能体（多端口彻底隔离）
    __table_args__ = (PrimaryKeyConstraint("id", "user_id", "port"),)

    id: Mapped[str] = mapped_column(String)
    user_id: Mapped[str] = mapped_column(
        ForeignKey("users.id", ondelete="CASCADE"), nullable=False,
    )
    port: Mapped[str] = mapped_column(String, default="opc")  # opc/operator/government/... 端口隔离
    name: Mapped[str] = mapped_column(String, default="")
    description: Mapped[str] = mapped_column(Text, default="")
    language: Mapped[str] = mapped_column(String, default="zh")
    model_name: Mapped[str] = mapped_column(String, default="")
    deletable: Mapped[bool] = mapped_column(Boolean, default=True)
    use_fixed_soul: Mapped[bool] = mapped_column(Boolean, default=False)
    created_at: Mapped[str] = mapped_column(String, default="")
    updated_at: Mapped[str] = mapped_column(String, default="")


# ── 运营端业务模型（平台运营/任务/服务商/内容/配置）────────────────────────

class Task(Base):
    """平台任务（运营端可审核/下架；后续各端口接入）。

    状态机（扩展支持扫码接单）：draft/pending/review/published/claimed/doing/completed/cancelled。
    扫码接单流转：published → claimed(claimed_by/claimed_at) → doing(doing_at) → completed。
    历史接单流水见 TaskClaim；claim 记录 claimed_by/claimed_at/doing_at。
    """

    __tablename__ = "tasks"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    task_code: Mapped[str] = mapped_column(String, default="", index=True)  # 展示/扫码短码(唯一)
    title: Mapped[str] = mapped_column(String, default="")
    category: Mapped[str] = mapped_column(String, default="")   # 分类字典 name（见 TaskCategory）
    category_id: Mapped[str | None] = mapped_column(ForeignKey("task_categories.id"), nullable=True)
    sub_category: Mapped[str] = mapped_column(String, default="")
    description: Mapped[str] = mapped_column(Text, default="")
    tags: Mapped[str] = mapped_column(String, default="")   # 逗号分隔展示标签
    mode: Mapped[str] = mapped_column(String, default="grab")  # grab/bid/assign/recommend(旧 designated→assign/dispatch→recommend)
    budget_min: Mapped[int] = mapped_column(Integer, default=0)
    budget_max: Mapped[int] = mapped_column(Integer, default=0)
    deadline: Mapped[str] = mapped_column(String, default="")   # 报名/接单截止时间
    delivery_days: Mapped[int] = mapped_column(Integer, default=0)  # 交付时限(接单后 N 天)
    headcount: Mapped[int] = mapped_column(Integer, default=0)   # 限制接单人数(0=不限)
    exclusive: Mapped[bool] = mapped_column(Boolean, default=False)  # 是否独占(仅一人可接)
    display_priority: Mapped[int] = mapped_column(Integer, default=0)  # 大屏展示排序(越大越前)
    status: Mapped[str] = mapped_column(String, default="draft")  # draft/pending/review/published/claimed/doing/completed/cancelled
    published_at: Mapped[str] = mapped_column(String, default="")  # 发布时间(→published 时)
    claimed_by: Mapped[str | None] = mapped_column(ForeignKey("users.id"), nullable=True)
    claimed_at: Mapped[str] = mapped_column(String, default="")
    doing_at: Mapped[str] = mapped_column(String, default="")
    publisher_id: Mapped[str | None] = mapped_column(ForeignKey("users.id"), nullable=True)  # 发包方(用户)
    publisher_org_id: Mapped[str | None] = mapped_column(ForeignKey("organizations.id"), nullable=True)
    publisher_name: Mapped[str] = mapped_column(String, default="")
    # ── 多端任务体系扩展字段 ──
    publisher_role: Mapped[str] = mapped_column(String, default="")       # enterprise/operator/park
    visibility: Mapped[str] = mapped_column(String, default="public")     # public/assigned_only/c_visible
    c_visible: Mapped[bool] = mapped_column(Boolean, default=True)        # 是否进 C 端任务广场
    park_public: Mapped[bool] = mapped_column(Boolean, default=False)     # 是否公有任务(各园区大屏可见/本园可接)
    assign_type: Mapped[str] = mapped_column(String, default="")          # opc/park(指派模式)
    assign_park_id: Mapped[str | None] = mapped_column(String, nullable=True)   # 指派给某园区
    assign_opc_id: Mapped[str | None] = mapped_column(String, nullable=True)    # 指派给某 OPC
    park_id: Mapped[str | None] = mapped_column(String, nullable=True)          # 归属园区(园区发布/专属)
    park_released: Mapped[bool] = mapped_column(Boolean, default=False)   # 园区内已发单(园区企业可抢)
    bid_quota: Mapped[int] = mapped_column(Integer, default=0)            # 竞标报名人数上限(0=不限)
    win_quota: Mapped[int] = mapped_column(Integer, default=0)            # 竞标中标人数(默认1)
    eligibility: Mapped[str] = mapped_column(Text, default="{}")          # 接单资格条件(JSON 集)
    settle_mode: Mapped[str] = mapped_column(String, default="operator_escrow")  # 资金托管方式
    created_at: Mapped[str] = mapped_column(String, default="")
    updated_at: Mapped[str] = mapped_column(String, default="")


class TaskClaim(Base):
    """任务接单流水（扫码/抢单/投标/指派/推荐），rich 记录任务状态流转历史。"""

    __tablename__ = "task_claims"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    task_id: Mapped[str] = mapped_column(
        ForeignKey("tasks.id", ondelete="CASCADE"), nullable=False, index=True,
    )
    claimer_user_id: Mapped[str] = mapped_column(
        ForeignKey("users.id", ondelete="SET NULL"), nullable=True,
    )
    claimer_name: Mapped[str] = mapped_column(String, default="")
    claim_source: Mapped[str] = mapped_column(String, default="scan")  # scan/grab/bid/assign/recommend
    claimed_at: Mapped[str] = mapped_column(String, default="")
    status: Mapped[str] = mapped_column(String, default="claimed")  # claimed/doing/completed/withdrawn/assigned/recommended
    created_at: Mapped[str] = mapped_column(String, default="")
    updated_at: Mapped[str] = mapped_column(String, default="")


class TaskCategory(Base):
    """任务分类字典（顶层 35 类，取自 任务类别.json）。"""

    __tablename__ = "task_categories"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    name: Mapped[str] = mapped_column(String, default="", index=True)
    sort: Mapped[int] = mapped_column(Integer, default=0)
    modes: Mapped[str] = mapped_column(String, default="")  # 兼容位掩码 hint(逗号分隔,可选)
    status: Mapped[str] = mapped_column(String, default="active")  # active/disabled


class ServiceProvider(Base):
    """服务商（运营端审核/评级/考核）。"""

    __tablename__ = "service_providers"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    name: Mapped[str] = mapped_column(String, default="")
    category: Mapped[str] = mapped_column(String, default="")  # 财税/工商/法务/知识产权/云服务...
    org_id: Mapped[str | None] = mapped_column(ForeignKey("organizations.id"), nullable=True)
    level: Mapped[str] = mapped_column(String, default="certified")  # certified/premium/gold/official
    rating: Mapped[float] = mapped_column(Float, default=5.0)
    order_count: Mapped[int] = mapped_column(Integer, default=0)
    status: Mapped[str] = mapped_column(String, default="pending")  # pending/active/blacklisted
    contact: Mapped[str] = mapped_column(String, default="")
    created_at: Mapped[str] = mapped_column(String, default="")
    updated_at: Mapped[str] = mapped_column(String, default="")


class ContentItem(Base):
    """平台内容（政策/课程/资讯/公告/活动）。"""

    __tablename__ = "content_items"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    type: Mapped[str] = mapped_column(String, default="news")  # policy/course/news/notice/activity
    title: Mapped[str] = mapped_column(String, default="")
    summary: Mapped[str] = mapped_column(String, default="")
    body: Mapped[str] = mapped_column(Text, default="")
    publisher_id: Mapped[str | None] = mapped_column(ForeignKey("users.id"), nullable=True)
    # 资讯富字段：封面/图集/视频/外链/发布人
    cover: Mapped[str] = mapped_column(String, default="")            # 加宽封面图 URL（3.35:1）
    cover_small: Mapped[str] = mapped_column(String, default="")      # 小封面图 URL（1:1，可选）
    images_json: Mapped[str] = mapped_column(Text, default="[]")      # 图集（JSON url 数组）
    video: Mapped[str] = mapped_column(String, default="")            # 视频 URL
    video_cover: Mapped[str] = mapped_column(String, default="")      # 视频封面
    link: Mapped[str] = mapped_column(String, default="")             # 外链
    publisher_name: Mapped[str] = mapped_column(String, default="")   # 发布人昵称快照
    publisher_avatar: Mapped[str] = mapped_column(String, default="") # 发布人头像快照
    read_count: Mapped[int] = mapped_column(Integer, default=0)       # 阅读数
    card_mode: Mapped[str] = mapped_column(String, default="big")     # big 大图 | small 小图（运营端设）
    is_public: Mapped[bool] = mapped_column(Boolean, default=True)    # 是否公开（公开=C端，否则仅园区大屏）
    source: Mapped[str] = mapped_column(String, default="operator")   # operator 运营端 | carrier 园区端
    tenant_id: Mapped[str] = mapped_column(String, default="")        # 园区端发布所属园区
    priority: Mapped[int] = mapped_column(Integer, default=0)         # 优先级 0-999 越大越靠前（C端排序）
    status: Mapped[str] = mapped_column(String, default="draft")  # draft/pending/published/offline（pending=待审核）
    created_at: Mapped[str] = mapped_column(String, default="")
    updated_at: Mapped[str] = mapped_column(String, default="")


class ContentComment(Base):
    """资讯留言。"""

    __tablename__ = "content_comments"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    content_id: Mapped[str] = mapped_column(String, default="", index=True)
    user_id: Mapped[str] = mapped_column(String, default="")
    username: Mapped[str] = mapped_column(String, default="")
    nickname: Mapped[str] = mapped_column(String, default="")
    avatar: Mapped[str] = mapped_column(String, default="")
    content: Mapped[str] = mapped_column(Text, default="")
    created_at: Mapped[str] = mapped_column(String, default="")


class SystemConfig(Base):
    """平台系统配置（键值）。"""

    __tablename__ = "system_configs"

    key: Mapped[str] = mapped_column(String, primary_key=True)
    value: Mapped[str] = mapped_column(String, default="")
    description: Mapped[str] = mapped_column(String, default="")
    updated_at: Mapped[str] = mapped_column(String, default="")


class PortalDashboard(Base):
    """端口工作台聚合数据（按端口存 JSON 载荷，全部由服务端提供）。"""

    __tablename__ = "portal_dashboards"

    port: Mapped[str] = mapped_column(String, primary_key=True)
    payload: Mapped[str] = mapped_column(Text, default="{}")
    updated_at: Mapped[str] = mapped_column(String, default="")


class PortalPage(Base):
    """端口子页面数据（按 端口+页面 存 JSON 载荷，全部由服务端提供）。"""

    __tablename__ = "portal_pages"

    port: Mapped[str] = mapped_column(String, primary_key=True)
    page: Mapped[str] = mapped_column(String, primary_key=True)
    payload: Mapped[str] = mapped_column(Text, default="{}")
    updated_at: Mapped[str] = mapped_column(String, default="")


# ── 投资人端（投融资 · 路演 · 培训）──────────────────────────────────────

class InvestorPreference(Base):
    """投资人投资方向偏好。"""

    __tablename__ = "investor_preferences"

    user_id: Mapped[str] = mapped_column(
        ForeignKey("users.id", ondelete="CASCADE"), primary_key=True,
    )
    industries: Mapped[str] = mapped_column(String, default="[]")   # JSON list
    stage: Mapped[str] = mapped_column(String, default="")          # seed/angel/series_a/...
    amount_min: Mapped[int] = mapped_column(Integer, default=0)
    amount_max: Mapped[int] = mapped_column(Integer, default=0)
    region_id: Mapped[str | None] = mapped_column(ForeignKey("regions.id"), nullable=True)
    updated_at: Mapped[str] = mapped_column(String, default="")


class Roadshow(Base):
    """投融资路演活动（线上/线下/混合），支持按发布主体与范围审核。"""

    __tablename__ = "roadshows"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    publisher_id: Mapped[str] = mapped_column(String, default="")
    publisher_role: Mapped[str] = mapped_column(String, default="investor")  # investor/government/operator/carrier/enterprise
    title: Mapped[str] = mapped_column(String, default="")
    summary: Mapped[str] = mapped_column(String, default="")
    activity_type: Mapped[str] = mapped_column(String, default="online")  # online/offline/hybrid
    scope_type: Mapped[str] = mapped_column(String, default="all")  # all/region/org
    region_id: Mapped[str | None] = mapped_column(ForeignKey("regions.id"), nullable=True)
    start_at: Mapped[str] = mapped_column(String, default="")
    end_at: Mapped[str] = mapped_column(String, default="")
    register_deadline: Mapped[str] = mapped_column(String, default="")
    quota: Mapped[int] = mapped_column(Integer, default=0)
    venue: Mapped[str] = mapped_column(String, default="")          # 线下地点/直播间
    live_url: Mapped[str] = mapped_column(String, default="")
    status: Mapped[str] = mapped_column(String, default="draft")    # draft/submitted/reviewing/published/registering/ongoing/ended/archived/rejected/cancelled
    review_comment: Mapped[str] = mapped_column(String, default="")
    need_review: Mapped[bool] = mapped_column(Boolean, default=True)
    created_at: Mapped[str] = mapped_column(String, default="")
    updated_at: Mapped[str] = mapped_column(String, default="")


class RoadshowRegistration(Base):
    """路演活动报名（项目方/投资人）。"""

    __tablename__ = "roadshow_registrations"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    roadshow_id: Mapped[str] = mapped_column(
        ForeignKey("roadshows.id", ondelete="CASCADE"), nullable=False,
    )
    user_id: Mapped[str] = mapped_column(
        ForeignKey("users.id", ondelete="CASCADE"), nullable=False,
    )
    role: Mapped[str] = mapped_column(String, default="investor")  # investor/project
    status: Mapped[str] = mapped_column(String, default="applying")  # applying/approved/attended/absent
    note: Mapped[str] = mapped_column(String, default="")
    created_at: Mapped[str] = mapped_column(String, default="")


class InvestmentIntent(Base):
    """投资意向/约谈/尽调。"""

    __tablename__ = "investment_intents"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    investor_id: Mapped[str] = mapped_column(
        ForeignKey("users.id", ondelete="CASCADE"), nullable=False,
    )
    project_id: Mapped[str] = mapped_column(String, default="")
    project_name: Mapped[str] = mapped_column(String, default="")
    status: Mapped[str] = mapped_column(String, default="interested")  # interested/contacted/meeting/term_sheet/invested/declined
    message: Mapped[str] = mapped_column(String, default="")
    created_at: Mapped[str] = mapped_column(String, default="")
    updated_at: Mapped[str] = mapped_column(String, default="")


class Bid(Base):
    """任务竞标（企业端竞标模式发标）。"""

    __tablename__ = "bids"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    task_id: Mapped[str] = mapped_column(
        ForeignKey("tasks.id", ondelete="CASCADE"), nullable=False,
    )
    opc_id: Mapped[str] = mapped_column(String, default="")
    opc_name: Mapped[str] = mapped_column(String, default="")
    quote: Mapped[int] = mapped_column(Integer, default=0)
    plan: Mapped[str] = mapped_column(String, default="")
    status: Mapped[str] = mapped_column(String, default="submitted")  # submitted/win/lost
    created_at: Mapped[str] = mapped_column(String, default="")
    updated_at: Mapped[str] = mapped_column(String, default="")


class SubsidyApplication(Base):
    """补贴申报（政务三级审批：区县→市→省→发放）。"""

    __tablename__ = "subsidy_applications"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    opc_id: Mapped[str] = mapped_column(String, default="")
    opc_name: Mapped[str] = mapped_column(String, default="")
    title: Mapped[str] = mapped_column(String, default="")
    amount: Mapped[int] = mapped_column(Integer, default=0)
    region_id: Mapped[str | None] = mapped_column(ForeignKey("regions.id"), nullable=True)
    status: Mapped[str] = mapped_column(String, default="applying")  # applying/district_review/city_review/province_review/approved/paid/rejected
    comment: Mapped[str] = mapped_column(String, default="")
    created_at: Mapped[str] = mapped_column(String, default="")
    updated_at: Mapped[str] = mapped_column(String, default="")


class ServiceReferral(Base):
    """载体-服务商引荐（三方绑定：载体引荐服务商→服务园区内 OPC）。"""

    __tablename__ = "service_referrals"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    carrier_id: Mapped[str] = mapped_column(String, default="")
    provider_id: Mapped[str] = mapped_column(String, default="")
    provider_name: Mapped[str] = mapped_column(String, default="")
    opc_id: Mapped[str] = mapped_column(String, default="")
    opc_name: Mapped[str] = mapped_column(String, default="")
    status: Mapped[str] = mapped_column(String, default="referred")  # referred/accepted/completed/declined
    created_at: Mapped[str] = mapped_column(String, default="")
    updated_at: Mapped[str] = mapped_column(String, default="")


class TrainingEnrollment(Base):
    """投融资培训报名/证书。"""

    __tablename__ = "training_enrollments"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    training_id: Mapped[str] = mapped_column(String, default="")
    training_name: Mapped[str] = mapped_column(String, default="")
    user_id: Mapped[str] = mapped_column(
        ForeignKey("users.id", ondelete="CASCADE"), nullable=False,
    )
    status: Mapped[str] = mapped_column(String, default="applying")  # applying/enrolled/completed/certificate
    created_at: Mapped[str] = mapped_column(String, default="")


# ── 横切能力：结算/合同/争议/评价/通知 ────────────────────────────────────

class Escrow(Base):
    """任务资金托管/结算。"""

    __tablename__ = "escrows"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    task_id: Mapped[str] = mapped_column(
        ForeignKey("tasks.id", ondelete="CASCADE"), nullable=False,
    )
    task_title: Mapped[str] = mapped_column(String, default="")
    amount: Mapped[int] = mapped_column(Integer, default=0)
    commission: Mapped[int] = mapped_column(Integer, default=0)  # 平台佣金
    status: Mapped[str] = mapped_column(String, default="deposited")  # deposited/frozen/released/refunded
    created_at: Mapped[str] = mapped_column(String, default="")
    updated_at: Mapped[str] = mapped_column(String, default="")


class Contract(Base):
    """任务电子合同。"""

    __tablename__ = "contracts"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    task_id: Mapped[str] = mapped_column(
        ForeignKey("tasks.id", ondelete="CASCADE"), nullable=False,
    )
    task_title: Mapped[str] = mapped_column(String, default="")
    enterprise_id: Mapped[str] = mapped_column(String, default="")
    opc_id: Mapped[str] = mapped_column(String, default="")
    status: Mapped[str] = mapped_column(String, default="signed")  # draft/signed/terminated
    content: Mapped[str] = mapped_column(String, default="")
    created_at: Mapped[str] = mapped_column(String, default="")


class Dispute(Base):
    """任务争议。"""

    __tablename__ = "disputes"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    task_id: Mapped[str] = mapped_column(
        ForeignKey("tasks.id", ondelete="CASCADE"), nullable=False,
    )
    task_title: Mapped[str] = mapped_column(String, default="")
    initiator: Mapped[str] = mapped_column(String, default="")
    reason: Mapped[str] = mapped_column(String, default="")
    status: Mapped[str] = mapped_column(String, default="opened")  # opened/mediating/resolved/closed
    resolution: Mapped[str] = mapped_column(String, default="")
    created_at: Mapped[str] = mapped_column(String, default="")


class Rating(Base):
    """任务互评。"""

    __tablename__ = "ratings"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    task_id: Mapped[str] = mapped_column(
        ForeignKey("tasks.id", ondelete="CASCADE"), nullable=False,
    )
    from_id: Mapped[str] = mapped_column(String, default="")
    to_id: Mapped[str] = mapped_column(String, default="")
    score: Mapped[int] = mapped_column(Integer, default=5)  # 1..5
    comment: Mapped[str] = mapped_column(String, default="")
    created_at: Mapped[str] = mapped_column(String, default="")


class Notification(Base):
    """站内通知。"""

    __tablename__ = "notifications"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    user_id: Mapped[str] = mapped_column(
        ForeignKey("users.id", ondelete="CASCADE"), nullable=False,
    )
    type: Mapped[str] = mapped_column(String, default="system")  # task/policy/order/subsidy/system
    title: Mapped[str] = mapped_column(String, default="")
    content: Mapped[str] = mapped_column(String, default="")
    read: Mapped[bool] = mapped_column(Boolean, default=False)
    created_at: Mapped[str] = mapped_column(String, default="")


# ── OPC 超级个体业务模型（工作台/我的任务/财务/消息）────────────────────

class OpcProfile(Base):
    """OPC 超级个体档案（信用评分等）。"""

    __tablename__ = "opc_profiles"

    user_id: Mapped[str] = mapped_column(
        ForeignKey("users.id", ondelete="CASCADE"), primary_key=True,
    )
    credit_score: Mapped[int] = mapped_column(Integer, default=80)
    created_at: Mapped[str] = mapped_column(String, default="")
    updated_at: Mapped[str] = mapped_column(String, default="")


class FinanceRecord(Base):
    """OPC 财务流水（收入/支出）。"""

    __tablename__ = "finance_records"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    user_id: Mapped[str] = mapped_column(
        ForeignKey("users.id", ondelete="CASCADE"), nullable=False,
    )
    category: Mapped[str] = mapped_column(String, default="income")  # income | expense
    amount: Mapped[int] = mapped_column(Integer, default=0)
    date: Mapped[str] = mapped_column(String, default="")          # YYYY-MM-DD
    note: Mapped[str] = mapped_column(String, default="")
    created_at: Mapped[str] = mapped_column(String, default="")


class Message(Base):
    """OPC 站内消息。"""

    __tablename__ = "messages"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    user_id: Mapped[str] = mapped_column(
        ForeignKey("users.id", ondelete="CASCADE"), nullable=False,
    )
    msg_type: Mapped[str] = mapped_column(String, default="system")  # task/policy/service/agent/system
    title: Mapped[str] = mapped_column(String, default="")
    content: Mapped[str] = mapped_column(String, default="")
    read: Mapped[bool] = mapped_column(Boolean, default=False)
    created_at: Mapped[str] = mapped_column(String, default="")


class OpcTask(Base):
    """OPC 个人任务看板（「我的任务」：进行中/已完成/紧急）。"""

    __tablename__ = "opc_tasks"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    user_id: Mapped[str] = mapped_column(
        ForeignKey("users.id", ondelete="CASCADE"), nullable=False,
    )
    title: Mapped[str] = mapped_column(String, default="")
    status: Mapped[str] = mapped_column(String, default="in_progress")  # in_progress/completed/urgent
    budget: Mapped[int] = mapped_column(Integer, default=0)
    deadline: Mapped[str] = mapped_column(String, default="")
    progress: Mapped[int] = mapped_column(Integer, default=0)
    created_at: Mapped[str] = mapped_column(String, default="")
    updated_at: Mapped[str] = mapped_column(String, default="")


# ===========================================================================
# 培训业务子应用（原 app/training 独立 opc.db → 并入唯一总库）
# ===========================================================================

class TrainingAccount(Base):
    """培训站账号（原 accounts，含手机/微信登录）。"""
    __tablename__ = "accounts"
    id: Mapped[str | None] = mapped_column(String, primary_key=True)
    username: Mapped[str | None] = mapped_column(String, unique=True, nullable=False)
    wxid: Mapped[str | None] = mapped_column(String, default="")
    phone: Mapped[str | None] = mapped_column(String, default="")
    contact: Mapped[str | None] = mapped_column(String, default="")
    name: Mapped[str | None] = mapped_column(String, default="")
    avatar: Mapped[str | None] = mapped_column(String, default="")
    password: Mapped[str | None] = mapped_column(String, default="")
    phone_bound: Mapped[int | None] = mapped_column(Integer, default=0)
    identities: Mapped[str | None] = mapped_column(Text, default="[]")
    status_label: Mapped[str | None] = mapped_column(String, default="")
    topics: Mapped[str | None] = mapped_column(Text, default="")
    source: Mapped[str | None] = mapped_column(String, default="")
    created_at: Mapped[str | None] = mapped_column(String, default="")


class Event(Base):
    __tablename__ = "events"
    id: Mapped[str | None] = mapped_column(String, primary_key=True)
    type: Mapped[str | None] = mapped_column(String, default="")
    mode: Mapped[str | None] = mapped_column(String, default="offline")
    title: Mapped[str | None] = mapped_column(String, default="")
    subtitle: Mapped[str | None] = mapped_column(String, default="")
    desc: Mapped[str | None] = mapped_column(Text, default="")
    location: Mapped[str | None] = mapped_column(String, default="")
    host: Mapped[str | None] = mapped_column(String, default="")
    image: Mapped[str | None] = mapped_column(String, default="")
    link: Mapped[str | None] = mapped_column(String, default="")
    start_at: Mapped[str | None] = mapped_column(String, default="")
    end_at: Mapped[str | None] = mapped_column(String, default="")
    checkin_at: Mapped[str | None] = mapped_column(String, default="")
    duration_min: Mapped[int | None] = mapped_column(Integer, default=90)
    capacity: Mapped[int | None] = mapped_column(Integer, default=0)
    show_capacity: Mapped[int | None] = mapped_column(Integer, default=0)
    audit_mode: Mapped[str | None] = mapped_column(String, default="auto")
    status: Mapped[str | None] = mapped_column(String, default="open")


class Booking(Base):
    __tablename__ = "bookings"
    id: Mapped[str | None] = mapped_column(String, primary_key=True)
    created_at: Mapped[str | None] = mapped_column(String, default="")
    status: Mapped[str | None] = mapped_column(String, default="pending")
    audit_status: Mapped[str | None] = mapped_column(String, default="pending")
    username: Mapped[str | None] = mapped_column(String, default="")
    name: Mapped[str | None] = mapped_column(String, default="")
    contact: Mapped[str | None] = mapped_column(String, default="")
    status_label: Mapped[str | None] = mapped_column(String, default="")
    want: Mapped[str | None] = mapped_column(Text, default="")
    event_id: Mapped[str | None] = mapped_column(String, default="")
    event_title: Mapped[str | None] = mapped_column(String, default="")
    event_start: Mapped[str | None] = mapped_column(String, default="")
    topics: Mapped[str | None] = mapped_column(Text, default="")
    question: Mapped[str | None] = mapped_column(Text, default="")
    source: Mapped[str | None] = mapped_column(String, default="")
    checkin_at: Mapped[str | None] = mapped_column(String, default="")


class Test(Base):
    __tablename__ = "tests"
    id: Mapped[str | None] = mapped_column(String, primary_key=True)
    created_at: Mapped[str | None] = mapped_column(String, default="")
    username: Mapped[str | None] = mapped_column(String, default="")
    type_code: Mapped[str | None] = mapped_column(String, default="")
    persona: Mapped[str | None] = mapped_column(String, default="")
    adapt_index: Mapped[int | None] = mapped_column(Integer, default=0)
    adapt_level: Mapped[str | None] = mapped_column(String, default="")
    tracks: Mapped[str | None] = mapped_column(Text, default="")
    version: Mapped[str | None] = mapped_column(String, default="")


class Course(Base):
    __tablename__ = "courses"
    id: Mapped[str | None] = mapped_column(String, primary_key=True)
    category: Mapped[str | None] = mapped_column(String, default="")
    level: Mapped[str | None] = mapped_column(String, default="")
    title: Mapped[str | None] = mapped_column(String, default="")
    subtitle: Mapped[str | None] = mapped_column(String, default="")
    desc: Mapped[str | None] = mapped_column(Text, default="")
    price: Mapped[float | None] = mapped_column(Float, default=0.0)
    status: Mapped[str | None] = mapped_column(String, default="draft")
    start_at: Mapped[str | None] = mapped_column(String, default="")
    end_at: Mapped[str | None] = mapped_column(String, default="")
    venue: Mapped[str | None] = mapped_column(String, default="")
    quota: Mapped[int | None] = mapped_column(Integer, default=0)
    image: Mapped[str | None] = mapped_column(String, default="")
    host: Mapped[str | None] = mapped_column(String, default="")
    created_at: Mapped[str | None] = mapped_column(String, default="")


class PolicyLog(Base):
    __tablename__ = "policy_logs"
    id: Mapped[str | None] = mapped_column(String, primary_key=True)
    created_at: Mapped[str | None] = mapped_column(String, default="")
    username: Mapped[str | None] = mapped_column(String, default="")
    answers: Mapped[str | None] = mapped_column(Text, default="")
    policies_count: Mapped[int | None] = mapped_column(Integer, default=0)
    subsidies_count: Mapped[int | None] = mapped_column(Integer, default=0)
    loans_count: Mapped[int | None] = mapped_column(Integer, default=0)
    summary: Mapped[str | None] = mapped_column(Text, default="")


class PlanLog(Base):
    __tablename__ = "plan_logs"
    id: Mapped[str | None] = mapped_column(String, primary_key=True)
    created_at: Mapped[str | None] = mapped_column(String, default="")
    username: Mapped[str | None] = mapped_column(String, default="")
    region: Mapped[str | None] = mapped_column(String, default="")
    status: Mapped[str | None] = mapped_column(String, default="")
    need_park: Mapped[int | None] = mapped_column(Integer, default=0)
    has_staff: Mapped[int | None] = mapped_column(Integer, default=0)
    steps_count: Mapped[int | None] = mapped_column(Integer, default=0)


class SurveyLog(Base):
    __tablename__ = "survey_logs"
    id: Mapped[str | None] = mapped_column(String, primary_key=True)
    created_at: Mapped[str | None] = mapped_column(String, default="")
    username: Mapped[str | None] = mapped_column(String, default="")
    source: Mapped[str | None] = mapped_column(String, default="")
    answers: Mapped[str | None] = mapped_column(Text, default="")


# ===========================================================================
# 园区子应用（原 app/park 独立 park.db → 并入唯一总库）
# ===========================================================================

class ParkTenant(Base):
    __tablename__ = "park_tenants"
    id: Mapped[str] = mapped_column(String, primary_key=True)
    name: Mapped[str] = mapped_column(String, default="")
    intro_json: Mapped[str] = mapped_column(Text, default="[]")
    username: Mapped[str] = mapped_column(String, default="")
    salt: Mapped[str] = mapped_column(String, default="")
    password_hash: Mapped[str] = mapped_column(String, default="")
    admin_username: Mapped[str] = mapped_column(String, default="")
    status: Mapped[str] = mapped_column(String, default="active")
    data_json: Mapped[str] = mapped_column(Text, default="{}")
    agent_json: Mapped[str] = mapped_column(Text, default="{}")
    operator_user_id: Mapped[str] = mapped_column(String, default="")   # 园区归属载体账号,园区端据此只审本园区
    created_at: Mapped[str] = mapped_column(String, default="")


class ParkCompany(Base):
    __tablename__ = "park_companies"
    id: Mapped[str] = mapped_column(String, primary_key=True)
    tenant_id: Mapped[str] = mapped_column(ForeignKey("park_tenants.id", ondelete="CASCADE"), nullable=False, index=True)
    name: Mapped[str] = mapped_column(String, default="")
    zone: Mapped[str] = mapped_column(String, default="")
    room: Mapped[str] = mapped_column(String, default="")
    industry: Mapped[str] = mapped_column(String, default="")
    bio: Mapped[str] = mapped_column(Text, default="")
    founder: Mapped[str] = mapped_column(String, default="")
    status: Mapped[str] = mapped_column(String, default="applying")
    employees: Mapped[int | None] = mapped_column(Integer, nullable=True)
    # 企业丰富资料（参考入园申请表 §二 企业信息）
    legal_person: Mapped[str] = mapped_column(String, default="")        # 法定代表人
    legal_phone: Mapped[str] = mapped_column(String, default="")         # 法人联系电话
    registered_capital: Mapped[str] = mapped_column(String, default="")  # 注册资本(万元)
    company_type: Mapped[str] = mapped_column(String, default="")        # 企业类型/性质
    honors: Mapped[str] = mapped_column(Text, default="")                # 所获政策/荣誉
    address: Mapped[str] = mapped_column(String, default="")             # 企业地址
    contact_phone: Mapped[str] = mapped_column(String, default="")       # 企业联系人电话
    founded_at: Mapped[str] = mapped_column(String, default="")          # 成立时间
    emp_total: Mapped[int | None] = mapped_column(Integer, nullable=True)    # 职工总数
    emp_grad: Mapped[int | None] = mapped_column(Integer, nullable=True)     # 毕业大学生
    emp_layoff: Mapped[int | None] = mapped_column(Integer, nullable=True)   # 失业人员
    emp_veteran: Mapped[int | None] = mapped_column(Integer, nullable=True)  # 退役军人
    emp_migrant: Mapped[int | None] = mapped_column(Integer, nullable=True)  # 返乡农民工
    # 企业算力（只增不减）：折扣% off 模型价；配额为发放给成员的算力额度
    compute_discount: Mapped[int] = mapped_column(Integer, default=0)       # 折扣%（0-100，单调非降）
    compute_quota: Mapped[int] = mapped_column(Integer, default=0)          # 企业算力配额（单调非降/增量）
    compute_quota_used: Mapped[int] = mapped_column(Integer, default=0)     # 已分配/已用配额（统计）
    engine_group: Mapped[str] = mapped_column(String, default="")           # 引擎用户组名（折扣倍率载体）
    owner_user_id: Mapped[str] = mapped_column(String, default="")          # 负责人/管理员账号id（必填）
    created_at: Mapped[str] = mapped_column(String, default="")


class ParkKbDoc(Base):
    __tablename__ = "park_kb_docs"
    id: Mapped[str] = mapped_column(String, primary_key=True)
    tenant_id: Mapped[str] = mapped_column(ForeignKey("park_tenants.id", ondelete="CASCADE"), nullable=False, index=True)
    grp: Mapped[str] = mapped_column(String, default="general")
    title: Mapped[str] = mapped_column(String, default="")
    content_md: Mapped[str] = mapped_column(Text, default="")
    created_at: Mapped[str] = mapped_column(String, default="")


class ParkSetting(Base):
    """园区全局配置 kv（如视频识别开关/地址），admin 经 /park/admin/* 读写，运行时不建表/不灌种子。"""
    __tablename__ = "park_settings"
    key: Mapped[str] = mapped_column(String, primary_key=True)
    value: Mapped[str] = mapped_column(Text, default="")
    updated_at: Mapped[str] = mapped_column(String, default="")


class ParkAdmission(Base):
    """园区入驻申请（C端 小程序/网页提交，园区/运营端审核）。

    表单字段以 JSON 存入 form_json（申请人/企业/项目/入驻需求），
    上传资料 URL 存 docs_json（创业计划书/身份证/学历/执照/资质等）。
    """

    __tablename__ = "park_admissions"

    id: Mapped[str] = mapped_column(String, primary_key=True)
    tenant_id: Mapped[str] = mapped_column(String, default="")            # 所选园区 id
    tenant_name: Mapped[str] = mapped_column(String, default="")          # 冗余园区名（展示）
    user_id: Mapped[str] = mapped_column(String, default="", index=True)  # 申请人平台用户 id
    username: Mapped[str] = mapped_column(String, default="")             # 申请人登录名
    applicant_name: Mapped[str] = mapped_column(String, default="")       # 申请人姓名（快速列表展示）
    contact_phone: Mapped[str] = mapped_column(String, default="")        # 联系电话（列表展示）
    status: Mapped[str] = mapped_column(String, default="pending")        # pending/reviewing/approved/rejected
    form_json: Mapped[str] = mapped_column(Text, default="{}")            # 结构化表单（申请人/企业/项目/需求）
    docs_json: Mapped[str] = mapped_column(Text, default="{}")            # 上传资料 URL 集合
    source: Mapped[str] = mapped_column(String, default="miniprogram")    # miniprogram|web
    review_comment: Mapped[str] = mapped_column(String, default="")
    reviewed_by: Mapped[str] = mapped_column(String, default="")
    reviewed_at: Mapped[str] = mapped_column(String, default="")
    created_at: Mapped[str] = mapped_column(String, default="")
    updated_at: Mapped[str] = mapped_column(String, default="")


class ParkScreen(Base):
    __tablename__ = "park_screens"
    id: Mapped[str] = mapped_column(String, primary_key=True)
    tenant_id: Mapped[str | None] = mapped_column(ForeignKey("park_tenants.id", ondelete="CASCADE"), nullable=True, index=True)
    device_id: Mapped[str] = mapped_column(String, default="", index=True)
    name: Mapped[str] = mapped_column(String, default="")
    role: Mapped[str] = mapped_column(String, default="main")
    location: Mapped[str] = mapped_column(String, default="")
    status: Mapped[str] = mapped_column(String, default="unbound")   # unbound | bound
    code: Mapped[str] = mapped_column(String, default="")           # 待绑定连接码
    code_expires: Mapped[str] = mapped_column(String, default="")   # 码过期时间(ISO)
    bound_at: Mapped[str] = mapped_column(String, default="")
    created_at: Mapped[str] = mapped_column(String, default="")


class OpcCertification(Base):
    """OPC 认证申请表（用户提交资料 → 运营方审核）。"""
    __tablename__ = "opc_certifications"
    id: Mapped[str] = mapped_column(String, primary_key=True)
    user_id: Mapped[str] = mapped_column(String, default="", index=True)
    username: Mapped[str] = mapped_column(String, default="")
    real_name: Mapped[str] = mapped_column(String, default="")
    gender: Mapped[str] = mapped_column(String, default="")
    address: Mapped[str] = mapped_column(String, default="")
    industry: Mapped[str] = mapped_column(String, default="")
    ability: Mapped[str] = mapped_column(Text, default="")
    phone: Mapped[str] = mapped_column(String, default="")
    docs_json: Mapped[str] = mapped_column(Text, default="{}")
    status: Mapped[str] = mapped_column(String, default="pending")
    review_comment: Mapped[str] = mapped_column(String, default="")
    reviewed_by: Mapped[str] = mapped_column(String, default="")
    reviewed_at: Mapped[str] = mapped_column(String, default="")
    created_at: Mapped[str] = mapped_column(String, default="")
    updated_at: Mapped[str] = mapped_column(String, default="")


class ParkTransfer(Base):
    """OPC 转园申请表（园区 OPC 发起 → 园区/平台审核）。"""
    __tablename__ = "park_transfers"
    id: Mapped[str] = mapped_column(String, primary_key=True)
    user_id: Mapped[str] = mapped_column(String, default="", index=True)
    username: Mapped[str] = mapped_column(String, default="")
    from_park_id: Mapped[str] = mapped_column(String, default="")
    from_park_name: Mapped[str] = mapped_column(String, default="")
    to_park_id: Mapped[str] = mapped_column(String, default="")
    to_park_name: Mapped[str] = mapped_column(String, default="")
    reason: Mapped[str] = mapped_column(Text, default="")
    status: Mapped[str] = mapped_column(String, default="pending")
    review_comment: Mapped[str] = mapped_column(String, default="")
    reviewed_by: Mapped[str] = mapped_column(String, default="")
    reviewed_at: Mapped[str] = mapped_column(String, default="")
    created_at: Mapped[str] = mapped_column(String, default="")
    updated_at: Mapped[str] = mapped_column(String, default="")