docs(plans): #717 Warm redundancy design spec + implementation plan (draft for owner approval)
Spec: per-shape contract (Unset/None/Warm), RedundancySupport + ServerUriArray graph,
ServiceLevel bands, per-service standby behaviour, alarm suppression + ConditionRefresh
(D5), strict first-delivery (D4), transition sequencing, ordered snapshot revisions,
ScadaBridge impact, SDK 2.0.1 re-proof list, open questions. Plan: T0-T13 with wire
tests, docker-dev live gate, rollout/rollback. Docs only.
Claude-Session: https://claude.ai/code/session_01GT67AD99zQQqpLCVm3p7xk
Joseph Doherty
c06769991b