fix(db): updated db setup for tests

7project/backend/app/services/db.py

@@ -3,20 +3,11 @@ from fastapi import Depends
 from sqlalchemy.ext.asyncio import AsyncSession
 from fastapi_users.db import SQLAlchemyUserDatabase
 
-from ..core.db import async_session_maker, engine
-from ..core.base import Base
+from ..core.db import async_session_maker
 from ..models.user import User, OAuthAccount
 
-_initialized = False
-
 
 async def get_async_session() -> AsyncGenerator[AsyncSession, None]:
-    global _initialized
-    if not _initialized:
-        # Lazily ensure tables exist; helpful for test runs without migrations
-        async with engine.begin() as conn:
-            await conn.run_sync(Base.metadata.create_all)
-        _initialized = True
     async with async_session_maker() as session:
         yield session