enh: query caching

Co-Authored-By: Jacob Leksan <63938553+jmleksan@users.noreply.github.com>

backend/open_webui/utils/middleware.py

@@ -101,6 +101,7 @@ from open_webui.env import (
     CHAT_RESPONSE_MAX_TOOL_CALL_RETRIES,
     BYPASS_MODEL_ACCESS_CONTROL,
     ENABLE_REALTIME_CHAT_SAVE,
+    ENABLE_QUERIES_CACHE,
 )
 from open_webui.constants import TASKS
 
@@ -391,6 +392,9 @@ async def chat_web_search_handler(
         except Exception as e:
             queries = [response]
 
+        if ENABLE_QUERIES_CACHE:
+            request.state.cached_queries = queries
+
     except Exception as e:
         log.exception(e)
         queries = [user_message]