R20E-R01 rollback guidance

#!/usr/bin/env bash
# R20E installs no source. If a STOP leaves VM101 in DEGRADED_POOL, the retry service is restarted and next_refresh_epoch is normalized to the production interval.
# Manual snapshot fallback, only after explicit operator decision:
ssh pve-mgts "qm rollback 101 r20e-pre-0720-132016"