Plan:
- [x] Package swh.scheduler v0.17.0
- [x] Upgrade python3-swh.scheduler on scheduler0.staging
- [x] Migrate db version from 28 to 30 (impacted tables: origin_visit_stats, scheduler_metrics)
- [x] Restart scheduler services [1]
- [ ] Ensure the journal client is doing its new job
[1]
```
systemctl restart gunicorn-swh-scheduler \
swh-scheduler-listener.service \
swh-scheduler-runner.service \
swh-scheduler-runner-priority.service \
swh-scheduler-journal-client.service
```