fix model import

Author: whhe

api/models/model.py

@@ -29,10 +29,8 @@
 from .account import Account, Tenant
 from .base import Base
 from .engine import db
-from .enums import CreatedByRole
+from .enums import CreatorUserRole
 from .types import StringUUID, no_length_string, text_default, uuid_default, varchar_default, adjusted_text
-from .workflow import WorkflowRunStatus
-
 if TYPE_CHECKING:
     from .workflow import Workflow