Add extra chunking information in Tenant schema

Add extra scripts for flask-migrate to support refactoring

migrations/tenant/env.py

@@ -6,7 +6,7 @@ from flask import current_app
 from alembic import context
 from sqlalchemy import NullPool, engine_from_config, text
 
-from common.models import Tenant
+from common.models.user import Tenant
 
 import pgvector
 from pgvector.sqlalchemy import Vector