refac: modernize type annotations (PEP 604 / PEP 585)

backend/open_webui/models/folders.py

@@ -1,15 +1,13 @@
 import logging
+import re
 import time
 import uuid
 from typing import Optional
-import re
-
-
-from pydantic import BaseModel, ConfigDict
-from sqlalchemy import BigInteger, Column, Text, JSON, Boolean, func, select, delete
-from sqlalchemy.ext.asyncio import AsyncSession
 
 from open_webui.internal.db import Base, JSONField, get_async_db_context
+from pydantic import BaseModel, ConfigDict
+from sqlalchemy import JSON, BigInteger, Boolean, Column, Text, delete, func, select
+from sqlalchemy.ext.asyncio import AsyncSession
 
 log = logging.getLogger(__name__)