save_code_now: Add Web API endpoint to get info about a single request
requested to merge anlambert/swh-web:api-save-code-now-add-get-single-request-info-endpoint into master
It can be useful to follow up on a single Save Code Now request through the Web API.
To do so, add a new Web API endpoint /api/1/origin/save/(request_id)/ to get info
about a request using its unique identifier.
Add request identifier and its info URL in the JSON data returned by the
/api/1/origin/save/(visit_type)/url/(origin_url)/ endpoint and the save
origin webhook ones.
Related to #4727 (closed)