Large databases now use daily physical backups

[darora]

Databases larger than 100GB are being transitioned to using physical backups for their daily backups.

Physical backups are more performant, have lower impact on the db, and avoid holding locks for long periods of time. Restores continue to work as expected, but backups taken using this method can no longer be downloaded from the dashboard.

Over the next few months, we'll be introducing functionality to restore to a separate, new database, allowing for the perusal of the backed up data without disruption to the original project.

Please refer to https://supabase.com/docs/guides/platform/backups#daily-backups-process for additional details.