fix: fix inner API workspace Account.query error. (#16630)

api/controllers/inner_api/workspace/workspace.py

 from controllers.inner_api import api
 from controllers.inner_api.wraps import enterprise_inner_api_only
 from events.tenant_event import tenant_was_created
+from extensions.ext_database import db
 from models.account import Account
 from services.account_service import TenantService
 
         parser.add_argument("owner_email", type=str, required=True, location="json")
         args = parser.parse_args()
 
-        account = Account.query.filter_by(email=args["owner_email"]).first()
+        account = db.session.query(Account).filter_by(email=args["owner_email"]).first()
         if account is None:
             return {"message": "owner account not found."}, 404