removed logic to search first message, fixed query override (#3812)

backend/onyx/chat/process_message.py

@@ -254,6 +254,7 @@ def _get_force_search_settings(
             and new_msg_req.retrieval_options.run_search
             == OptionalSearchSetting.ALWAYS,
             new_msg_req.search_doc_ids,
+            new_msg_req.query_override is not None,
             DISABLE_LLM_CHOOSE_SEARCH,
         ]
     )
@@ -499,14 +500,6 @@ def stream_chat_message_objects(
                         f"existing assistant message id: {existing_assistant_message_id}"
                     )
 
-        # Disable Query Rephrasing for the first message
-        # This leads to a better first response since the LLM rephrasing the question
-        # leads to worst search quality
-        if not history_msgs:
-            new_msg_req.query_override = (
-                new_msg_req.query_override or new_msg_req.message
-            )
-
         # load all files needed for this chat chain in memory
         files = load_all_chat_files(
             history_msgs, new_msg_req.file_descriptors, db_session