重构数据库连接管理，添加元数据支持

app/auth/metadata_dependencies.py

@@ -0,0 +1,50 @@
+from dataclasses import dataclass
+from uuid import UUID
+
+from fastapi import Depends, HTTPException, status
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.auth.keycloak_dependencies import get_current_keycloak_sub
+from app.core.config import settings
+from app.infra.db.metadata.database import get_metadata_session
+from app.infra.repositories.metadata_repository import MetadataRepository
+
+
+async def get_metadata_repository(
+    session: AsyncSession = Depends(get_metadata_session),
+) -> MetadataRepository:
+    return MetadataRepository(session)
+
+
+async def get_current_metadata_user(
+    keycloak_sub: UUID = Depends(get_current_keycloak_sub),
+    metadata_repo: MetadataRepository = Depends(get_metadata_repository),
+):
+    if settings.AUTH_DISABLED:
+        return _AuthBypassUser()
+    user = await metadata_repo.get_user_by_keycloak_id(keycloak_sub)
+    if not user or not user.is_active:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN, detail="Inactive user"
+        )
+    return user
+
+
+async def get_current_metadata_admin(
+    user=Depends(get_current_metadata_user),
+):
+    if settings.AUTH_DISABLED:
+        return user
+    if user.is_superuser or user.role == "admin":
+        return user
+    raise HTTPException(
+        status_code=status.HTTP_403_FORBIDDEN, detail="Admin access required"
+    )
+
+
+@dataclass(frozen=True)
+class _AuthBypassUser:
+    id: UUID = UUID(int=0)
+    role: str = "admin"
+    is_superuser: bool = True
+    is_active: bool = True