feat(admin): 运营端培训业务 P0 — 新增 /admin/courses|activities|bookings|tests

新增 courses 表（app/training/db.py SEED_COURSES），经 training_admin_bridge 桥接
app.training 的课程/活动(events)/报名(bookings)/测评(tests) 数据为统一运营视图；
schemas 增 Course/Activity/Booking/Test 请求模型；rbac_operator.py 增四件套端点
（含 create/status/patch），走 operator 角色 + action:* 权限码 + write_audit。

app/api/schemas/operator.py

@@ -59,6 +59,49 @@ class ConfigUpdateRequest(BaseModel):
 
 # ── 算力对接（compute-engine）─────────────────────────────────────────────
 
+# ── 培训业务四件套（课程 / 活动 / 报名 / 测评）→ 桥接 app.training ─────────
+
+class CourseCreateRequest(BaseModel):
+    title: str
+    category: str = ""
+    level: str = ""
+    subtitle: str = ""
+    desc: str = ""
+    price: float = 0
+    status: str = "draft"
+    start_at: str = ""
+    end_at: str = ""
+    venue: str = ""
+    quota: int = 0
+    image: str = ""
+    host: str = ""
+
+
+class CourseStatusRequest(BaseModel):
+    status: str  # draft/published/ended/offline
+
+
+class ActivityStatusRequest(BaseModel):
+    status: str  # open/invite/pending/done/ended
+
+
+class BookingUpdateRequest(BaseModel):
+    status: str | None = None
+    audit_status: str | None = None
+    note: str | None = None
+
+
+class TestCreateRequest(BaseModel):
+    title: str
+    category: str = ""
+    pass_score: int = 0
+    question_count: int = 30
+
+
+class TestStatusRequest(BaseModel):
+    status: str  # enabled/disabled
+
+
 class ComputePingResponse(BaseModel):
     ok: bool
     version: str | None = None