Fix DB issue 2s

shared/database/base.py

@@ -229,7 +229,7 @@ class DatabaseManager:
                 "current_checked_in": pool.checkedin() if pool else 0,
                 "current_checked_out": pool.checkedout() if pool else 0,
                 "current_overflow": pool.overflow() if pool else 0,
-                "invalid_connections": pool.invalid() if pool else 0
+                "invalid_connections": getattr(pool, 'invalid', lambda: 0)() if pool else 0
             }
         except Exception as e:
             logger.error(f"Failed to get connection info: {e}", service=self.service_name)
@@ -357,4 +357,4 @@ async def get_legacy_db():
             await session.rollback()
             raise
         finally:
-            await session.close()
+            await session.close()