The code swap and gateway fleet restart touch all profiles, but the
pre-update quick snapshot photographed only the invoking profile's home
— siblings had no snapshot for the post-update safety nets or manual
restore to draw on.
- backup.py: create_pre_update_snapshots_all_profiles() — the SAME
snapshot set, per-file 1GiB cap, and keep policy as the invoking
profile (no partial tier, no new restore-coherence class), each into
the sibling's own state-snapshots/; restore_cron_jobs_all_profiles()
runs the #34600 cron-loss safety net per profile against its OWN
snapshot (same-generation by construction).
- update_cmd.py: sibling snapshots taken right after the invoking
profile's (best-effort, receipt-recorded); post-update cron restore
extended to every sibling.
- Docs: updating.md pre-update snapshot step now states the per-profile
behavior and the file-loss-recovery vs rollback contract.
- 9 unit tests + E2E (real files: sibling snapshot on disk, clobbered
jobs.json restored 7/7 from the sibling's own snapshot, keep=1 prune).
Teknium