feat(admission): 园区入驻申请 —— park_admissions表+训练子应用端点+上传放宽

- 模型迁移0012 park_admissions(tenant/user/form_json/docs_json/status)
- app/training: GET /api/park/tenants(公开) / POST /api/park-admission / mine / 运营列表+review
- /api/upload 放宽到 图片/pdf/doc,20MB

alembic/versions/0012_park_admissions.py

@@ -0,0 +1,41 @@
+"""park_admissions 表（园区入驻申请）
+
+Revision ID: 0012_park_admissions
+Revises: 0011_unique_user_identifiers
+Create Date: 2026-08-26
+"""
+from __future__ import annotations
+
+import sqlalchemy as sa
+from alembic import op
+
+revision = "0012_park_admissions"
+down_revision = "0011_unique_user_identifiers"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "park_admissions",
+        sa.Column("id", sa.String(), primary_key=True),
+        sa.Column("tenant_id", sa.String(), default="", index=True),
+        sa.Column("tenant_name", sa.String(), default=""),
+        sa.Column("user_id", sa.String(), default="", index=True),
+        sa.Column("username", sa.String(), default=""),
+        sa.Column("applicant_name", sa.String(), default=""),
+        sa.Column("contact_phone", sa.String(), default=""),
+        sa.Column("status", sa.String(), default="pending"),
+        sa.Column("form_json", sa.Text(), default="{}"),
+        sa.Column("docs_json", sa.Text(), default="{}"),
+        sa.Column("source", sa.String(), default="miniprogram"),
+        sa.Column("review_comment", sa.String(), default=""),
+        sa.Column("reviewed_by", sa.String(), default=""),
+        sa.Column("reviewed_at", sa.String(), default=""),
+        sa.Column("created_at", sa.String(), default=""),
+        sa.Column("updated_at", sa.String(), default=""),
+    )
+
+
+def downgrade() -> None:
+    op.drop_table("park_admissions")