Point the three monitoring restic CronJobs at the Harbor-hosted
mirror at harbor.basicstack.de/library/restic:0.17.3 so the backup
pipeline is not gated by Docker Hub throttling or upstream retag.
- Mirrored docker.io/restic/restic:0.17.3 into the public
`library` project via a one-shot crane copy Job. Digest in
Harbor matches the upstream index (sha256:8f5a62b4…).
- Updated the three CronJobs
(backup-loki-restic, backup-grafana-restic,
backup-k8s-resources) to pull from Harbor.
- Documented the tag-bump procedure in
docs/monitoring/restic-restore.md (§ Tag-bump procedure) and
pointed the restore-drill pod at the same Harbor image so the
restore round-trip stays image-consistent with the writers.
Refs: [DEV-493](/DEV/issues/DEV-493), parent [DEV-482](/DEV/issues/DEV-482).
Co-Authored-By: Paperclip <noreply@paperclip.ing>
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