fix(db-hardening): Add lib __init__.py and improve MinIO import error handling

services/city-service/lib/__init__.py

@@ -0,0 +1,7 @@
+"""
+City Service Library
+"""
+from .assets_client import upload_asset, delete_asset, ensure_bucket
+
+__all__ = ['upload_asset', 'delete_asset', 'ensure_bucket']
+

services/city-service/routes_city.py

@@ -18,9 +18,9 @@ import shutil
 try:
     from lib.assets_client import upload_asset as minio_upload_asset
     MINIO_AVAILABLE = True
-except ImportError:
+except ImportError as e:
     MINIO_AVAILABLE = False
-    logger.warning("MinIO client not available, falling back to local storage")
+    logger.warning(f"MinIO client not available, falling back to local storage: {e}")
 
 from models_city import (
     CityRoomRead,