Adds:
- swh-id as directory derivative persistent identifier
- swh-id-context the same as swh-id with origin as context in the pid
- swh-anchor-id as revision derivative persistent identifier
- swh-anchor-id-context the same as swh-anchor-id with origin as
context in the pid
Impacts:
- deposit status api
- private deposit update api
- loader
- deposit client (returned status endpoint result)
Related T1152
Note that you cannot arc patch locally this diff as the commit parent
is the prior opened diff.