backup-bot-two ignores backupbot.backup.path labels and always backs up
the full volume, making path-based restore-RED infeasible.
New approach: custom-html-bkp-bad has no pre_backup → marker never seeded
→ backup snapshot has no ci-marker.txt. pre_restore writes 'mutated'.
After restore: marker is MISSING or 'mutated' → test_restore_returns_state FAILS.
upgrade=skip (no version tags) is acceptable since passing_tiers_before=[install,backup].
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
