🐛 fix(manager.py): add inspector to check if table "flow" exists before creating tables again

The change was made to fix a bug where the tables were being recreated even if they already existed. By adding an inspector to check if the table "flow" exists before recreating the tables, we can prevent unnecessary table creation and improve performance.

src/backend/langflow/services/database/manager.py

@@ -171,6 +171,7 @@ class DatabaseService(Service):
 
         # Now check if the table "flow" exists, if not, something went wrong
         # and we need to create the tables again.
+        inspector = inspect(self.engine)
         table_names = inspector.get_table_names()
         for table in current_tables:
             if table not in table_names: