feat: store created_by and updated_by for apps, modelconfigs, and sites (#7613)

api/services/workflow/workflow_converter.py

@@ -74,6 +74,8 @@ class WorkflowConverter:
         new_app.api_rph = app_model.api_rph
         new_app.is_demo = False
         new_app.is_public = app_model.is_public
+        new_app.created_by = account.id
+        new_app.updated_by = account.id
         db.session.add(new_app)
         db.session.flush()
         db.session.commit()