Plan:
- [x] lister v0.15 (includes opam lister)
- [ ] loader.core: Tag v0.23 which includes the opam loader
- [ ] D6061: Add opam lister task to the worker configuration
- [ ] Register opam listing and loading task in the scheduler [1]
- [ ] Add new loader task type to the scheduler
- [ ] Trigger first listing
- [ ] Puppetize new swh-worker@loader_opam
- [ ] Deploy new loader
[1]
```
swhscheduler@scheduler0:~$ swh scheduler --config-file /etc/softwareheritage/scheduler/backend.yml task-type register
...
INFO:swh.scheduler.cli.task_type:Loading entrypoint for plugin lister.opam
INFO:swh.scheduler.cli.task_type:Create task type list-opam in scheduler
...
```