Data-only restic backups, rebuild-from-code recovery (Model A); central
off-cluster pull node (fisi) with 8TB mirror; 3-2-1 via pCloud (rclone)
+ rotated USB air-gap. Per-service backup__* contract + BACKUP.md as a
hard convention. Two-tier restore testing (ubongo container restore-verify
+ semi-annual staging DR rehearsal). One restic password escrowed to
Vaultwarden + paper (restic + vault passwords) for a non-circular
break-glass. Dead-man's-switch alerting via Uptime Kuma.
Resolves TODO 3.8; grounds ADR-011's backup-first assumption.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
