GitLab

  - migration script to add `source` to import failure table. Initially
    table `import_failures` is designed to save import failures for
    `build relation` action. Now we also want to save exceptions from
    `merge_requests.set_latest_merge_request_diff_ids!` action. So add a
    new column to record the `source` of the failure.
  - add retry logic for set_latest_merge_request_diff_ids
  - change with_try and log_import_failure signature to keyword args