fix: eager load ApiKey.user with selectinload to avoid lazy load in async context

src/auth.py

@@ -7,6 +7,7 @@ from fastapi import Depends, HTTPException, Security, status
 from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
 from jose import JWTError, jwt
 from sqlalchemy import select
+from sqlalchemy.orm import selectinload
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from src.config import settings
@@ -68,7 +69,9 @@ async def verify_api_key(raw_key: str, db: AsyncSession) -> User | None:
         return None
     prefix = raw_key[:11]
     result = await db.execute(
-        select(ApiKey).where(ApiKey.key_prefix == prefix, ApiKey.is_active == True)
+        select(ApiKey)
+        .options(selectinload(ApiKey.user))
+        .where(ApiKey.key_prefix == prefix, ApiKey.is_active == True)
         .join(ApiKey.user)
         .where(User.is_active == True)
     )