Cluster-side backups are healthier than assumed: three nightly Borg jobs to a
Hetzner Storage Box, all completing with plausible volumes and working prune
(synapse 199MB/247 files, authentik ~150MB, wikijs 223kB DB-only). No silent
failures.
Critical finding for #0030: the Borg passphrase and SSH key needed to READ those
backups are SOPS-encrypted under a single age key that exists only in the cluster
being backed up and on one laptop — no documented cold copy. Losing both makes all
three repos permanently unreadable. Cold escrow must precede any restore drill.
For #0010 this shrinks the work: the Storage Box + Borg pattern already exists and
is proven, so Gitea needs only its own repo there. The disabled cron (no backups
since 2026-07-30) remains separately urgent.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>