v0.5.2

• Server backup storage - backup repositories can now live in an S3-compatible bucket as well as on the agent host. Admins manage S3 bucket credentials centrally and assign storage per server
• Server-wide backup history - the overview reports authoritative history from the agents, and admins can delete a server's backups, abandon its local history without repository access, or rebuild a stack's run index straight from the repository.
• Backup safety rails - storage assignments, S3 bucket identities and server deletion are blocked while backup history remains, passwords cannot change while a backup operation is running
• Fixes - operations always record an end time when they complete, and confirmation modals can no longer be dismissed while their action is processing.
• The new storage and history features need agents on v0.5.2

Full Changelog: v0.5.1...v0.5.2