<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=202100) </details> <!--IssueSummary end--> To make sure we have context for all of the workers (https://gitlab.com/gitlab-com/gl-infra/scalability/issues/131), please add context to the [`MigrateExternalDiffsWorker`](https://gitlab.com/gitlab-org/gitlab/-/blob/6be10b2b9280de9b1d8d53e2a15c53c4c4122b2a/app/workers/migrate_external_diffs_worker.rb) which is scheduled from the [`ScheduleMigrateExternalDiffsWorker`](https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/workers/schedule_migrate_external_diffs_worker.rb#L5) through the [`MergeRequests::MigrateExternalDiffsService`](https://gitlab.com/gitlab-org/gitlab/-/blob/6be10b2b9280de9b1d8d53e2a15c53c4c4122b2a/app/services/merge_requests/migrate_external_diffs_service.rb#L12). I couldn't see any of these jobs run in the past 7 days, is this still used? Some more info in https://gitlab.com/gitlab-org/gitlab/-/blob/master/doc/development/sidekiq_style_guide.md#worker-context