refac/enh: folder optimization

backend/open_webui/models/chats.py

@@ -810,7 +810,7 @@ class ChatTable:
             return [ChatModel.model_validate(chat) for chat in all_chats]
 
     def get_chats_by_folder_id_and_user_id(
-        self, folder_id: str, user_id: str
+        self, folder_id: str, user_id: str, skip: int = 0, limit: int = 60
     ) -> list[ChatModel]:
         with get_db() as db:
             query = db.query(Chat).filter_by(folder_id=folder_id, user_id=user_id)
@@ -819,6 +819,11 @@ class ChatTable:
 
             query = query.order_by(Chat.updated_at.desc())
 
+            if skip:
+                query = query.offset(skip)
+            if limit:
+                query = query.limit(limit)
+
             all_chats = query.all()
             return [ChatModel.model_validate(chat) for chat in all_chats]