♻️(backend) rename DocumentViewset::_title_search in _search_title

We rename the private method _title_search in _search_title in the
DocumentViewset for having the search methods prefixed with _search

src/backend/core/api/viewsets.py

@@ -1434,21 +1434,27 @@ class DocumentViewSet(
         params.is_valid(raise_exception=True)
         search_type = self._get_search_type()
         if search_type == SearchType.TITLE:
-            return self._title_search(request, params.validated_data, *args, **kwargs)
+            return self._search_using_database(
+                request, params.validated_data, *args, **kwargs
+            )
 
         indexer = get_document_indexer()
         if indexer is None:
             # fallback on title search if the indexer is not configured
-            return self._title_search(request, params.validated_data, *args, **kwargs)
+            return self._search_using_database(
+                request, params.validated_data, *args, **kwargs
+            )
 
         try:
-            return self._search_with_indexer(
+            return self._search_using_indexer(
                 indexer, request, params=params, search_type=search_type
             )
         except requests.exceptions.RequestException as e:
             logger.error("Error while searching documents with indexer: %s", e)
             # fallback on title search if the indexer is not reached
-            return self._title_search(request, params.validated_data, *args, **kwargs)
+            return self._search_using_database(
+                request, params.validated_data, *args, **kwargs
+            )
 
     def _get_search_type(self) -> SearchType:
         """
@@ -1464,7 +1470,7 @@ class DocumentViewSet(
         return SearchType.TITLE
 
     @staticmethod
-    def _search_with_indexer(indexer, request, params, search_type):
+    def _search_using_indexer(indexer, request, params, search_type):
         """
         Returns a list of documents matching the query (q) according to the configured indexer.
         """
@@ -1491,7 +1497,7 @@ class DocumentViewSet(
             }
         )
 
-    def _title_search(self, request, validated_data, *args, **kwargs):
+    def _search_using_database(self, request, validated_data, *args, **kwargs):
         """
         Fallback search method when no indexer is configured.
         Only searches in the title field of documents.