Export worker run on RetrieveElement

Bastien Abadie
2022-06-21T08:48:38Z

Depends #1057

The endpoint `RetrieveElement` should embed a `WorkerRunSummarySerializer` that exposes:
- worker run id
- worker run summary

Depends #1057 (closed)

The endpoint RetrieveElement should embed a WorkerRunSummarySerializer that exposes:

worker run id

worker run summary