winery: Add support for CompositeObjId
This was missed in 667cb87b as that backend is not fully tested by the CI.
Related to swh/infra/sysadm-environment#5043 (closed).
Staging instance, all changes can be removed at any time
This was missed in 667cb87b as that backend is not fully tested by the CI.
Related to swh/infra/sysadm-environment#5043 (closed).