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

backend/open_webui/models/channels.py

@@ -4,31 +4,33 @@ import time
 import uuid
 from typing import Optional
 
-from open_webui.utils.validate import validate_profile_image_url
-
-from sqlalchemy import select, delete, update, func, case, or_, and_
-from sqlalchemy.ext.asyncio import AsyncSession
 from open_webui.internal.db import Base, JSONField, get_async_db_context
-from open_webui.models.groups import Groups
 from open_webui.models.access_grants import (
     AccessGrantModel,
     AccessGrants,
 )
-
+from open_webui.models.groups import Groups
+from open_webui.utils.validate import validate_profile_image_url
 from pydantic import BaseModel, ConfigDict, Field, field_validator
-from sqlalchemy.dialects.postgresql import JSONB
-
-
 from sqlalchemy import (
+    JSON,
     BigInteger,
     Boolean,
     Column,
     ForeignKey,
     String,
     Text,
-    JSON,
     UniqueConstraint,
+    and_,
+    case,
+    delete,
+    func,
+    or_,
+    select,
+    update,
 )
+from sqlalchemy.dialects.postgresql import JSONB
+from sqlalchemy.ext.asyncio import AsyncSession
 
 ####################
 # Channel DB Schema