In https://gitlab.com/gitlab-org/gitlab/-/commit/7f637e2af7006dc2b1b2649d9affc0b86cfb33c4 we introduced the json logger `update_mirror_service_json` to track errors related to LFS mirroring updates. Originally, the idea was to track also other errors of the update mirroring process in this file, nevertheless, any error fallback to the `Rails.logger` in `RepositoryUpdateMirrorWorker`. It would be great if we could track all update mirroring errors in the same file and avoid logging them to the general `Rails.logger`. That way, those will be easier to track. Basically, for this change, we will need to create the existing logger `UpdateMirrorServiceJsonLogger` in the `RepositoryUpdateMirrorWorker` and pass it to `UpdateMirrorService` in case it needs to log something. **Important:** before implementing this change we need to make an [MR to index the `update_mirror_service_json` file in fluentd](https://docs.gitlab.com/ee/development/logging.html#additional-steps-with-new-log-files). If we implement this before the indexing, we will lose the capacity to see these errors because they will no longer be in the general logger file.