Deploy the latest version of swh.model and swh.storage to production.
- make sure all new packages are available (swh.model, swh.storage, swh.deposit)
- run the first half of the database migration, adding the new fields to both databases (somerset then belvedere)
- check that postgresql replication still runs properly
- stop all workers
- upgrade and restart gunicorn-swh-storage instances
- saam
- moma
- webapp1
- storage01.euwest.azure
- upgrade and restart worker08
- check that new revisions and releases are getting the new offset fields populated
- restart all other workers
- run the data migration for the new fields on old objects
- add database constraints for all objects once the migration has run