Read backfills

curl --request GET \
  --url 'http://localhost:6789/api/backfills?_limit=20&_offset=0&include_run_count=true&pipeline_uuid=example_pipeline&api_key=zkWlN0PkIKSN0C11CfUHUj84OT5XOJ6tDZ6bDRO2' \
  --header 'OAUTH-TOKEN=some_really_long_string' \

{
  "backfills": [
    {
      "block_uuid": null,
      "completed_at": null,
      "created_at": "2023-03-23 18:27:58.848959+00:00",
      "end_datetime": "2023-03-05 00:00:00+00:00",
      "failed_at": null,
      "id": 9,
      "interval_type": "hour",
      "interval_units": 4,
      "metrics": null,
      "name": "sparkling glitter",
      "pipeline_schedule_id": null,
      "pipeline_uuid": "example_pipeline",
      "start_datetime": "2023-03-01 00:00:00+00:00",
      "started_at": null,
      "status": null,
      "total_run_count": 25,
      "updated_at": "2023-03-23 18:28:22.379725+00:00",
      "variables": null
    }
  ],
  "metadata": {
    "count": 0,
    "next": false
  }
}