fixed missing import

src/server/api/auth.py

@@ -1,6 +1,7 @@
 """Authentication API endpoints for Aniworld."""
 from typing import Optional
 
+import structlog
 from fastapi import APIRouter, Depends, HTTPException
 from fastapi import status as http_status
 from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
@@ -16,6 +17,8 @@ from src.server.models.config import AppConfig
 from src.server.services.auth_service import AuthError, LockedOutError, auth_service
 from src.server.services.config_service import get_config_service
 
+logger = structlog.get_logger(__name__)
+
 # NOTE: import dependencies (optional_auth, security) lazily inside handlers
 # to avoid importing heavyweight modules (e.g. sqlalchemy) at import time.