feat: workflow和chat分离

1，增加了创建workflow的页面
2.删除了event

kilostar/utils/access.py

@@ -12,13 +12,14 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 
+from __future__ import annotations
+
 import jwt
 import os
 from datetime import datetime, timedelta, timezone
 from typing import Optional
 from fastapi import HTTPException, status, Request
 from pydantic import BaseModel, ValidationError
-from kilostar.core.postgres_database.model import User
 from pwdlib import PasswordHash