This allows the premise of the scenario [1] to occur.
Premise because the tids and bits about the metadata information to send to the
metadata storage is not completely clear. A first review from @moranegg and
@vlorentz to clarify that part would be nice.
[1] Update metadata for deposit whose archive and metadata are already stored
in the archive. Described in:
https://hackmd.io/yUZAp78KTdSvE4drf0_MqQ#2-Cas-d%E2%80%99utilisations-contributeur-HAL