d1a3cd0625
§8: controller-driven quiesce (stop stacks -> POST /backup -> restart) implemented (controller v0.36.0 internal/quiesce + agent v0.11.0 cadence/phases); crash-safety centerpiece + 8B.2 snapshot-mode fast-follow documented. Validated live: quiesced postgres restore clean vs crash-consistent WAL recovery. §9 table: 8B implemented. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>