Upload backups to object storage
Repository backups are currently stored in a giant tar archive on the Rails side. This makes creating and restoring backups painful.
Idea
Praefect should be able to have an attached object storage sink for creating backups, which can act as source when restoring backups.
For the first iteration it's fine if all repositories are stored in one procedure, but later it would be great if there was the ability to only backup one repository, and restore them individually too.
/cc @proglottis @mjwood