feat(server): add updatedAt to Asset, Album and User (#1566)

* feat: add updatedAt info to DTO and generate api

* chore: remove unsued file

* chore: Add update statement to add/remove asset/user to album

* fix: test

mobile/openapi/test/album_response_dto_test.dart

@@ -41,6 +41,11 @@ void main() {
       // TODO
     });
 
+    // String updatedAt
+    test('to test the property `updatedAt`', () async {
+      // TODO
+    });
+
     // String albumThumbnailAssetId
     test('to test the property `albumThumbnailAssetId`', () async {
       // TODO