Force update search method to keyword_search (#25464)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

api/controllers/service_api/dataset/dataset.py

         else:
             data["embedding_available"] = True
 
+            # force update search method to keyword_search if indexing_technique is economic
+            data["retrieval_model_dict"]["search_method"] = "keyword_search"
+
         if data.get("permission") == "partial_members":
             part_users_list = DatasetPermissionService.get_dataset_partial_member_list(dataset_id_str)
             data.update({"partial_member_list": part_users_list})