Baseline backup 34a05d70 pulled off-box. Runbook covers 3 layers: HA-level, PBS VM-level (dev-lane drill rule), fresh-HAOS-from-git. Meat: https://projects.knownelement.com/issues/790#note-4970
Also absorbs PFVCluster operator tooling: tools/ha-ws-call.py and docs/reference-packs/ (historical, NOT loaded by HA — clearly marked). No live-config changes in this commit. Detail: https://projects.knownelement.com/issues/762