Joseph Doherty
2982cc4bb5
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The ContinuousHistorizationRecorder was spawned with an EMPTY historized-ref set, so it registered interest in nothing and historized nothing. This feeds it the currently-historized tag refs on every address-space deploy/redeploy so its DependencyMuxActor interest converges to exactly the historized set (the same refs the EnsureTags provisioning hook resolves: override-or-FullName). Design — delta convergence (the plan is a pure DIFF): - New seam IHistorizedTagSubscriptionSink (Core.Abstractions/Historian) with a Null no-op singleton, mirroring how IHistorianProvisioning decouples the T15 hook. AddressSpaceApplier gains a DEFAULTED ctor param (Null sink) so all ~80 existing call sites + the production site compile unchanged. - Apply() only ever sees a plan diff (an incremental/surgical apply carries a delta, not the full set), so the applier feeds an add/remove DELTA computed from AddedEquipmentTags / RemovedEquipmentTags / ChangedEquipmentTags. The recorder keeps the full set and re-registers it. The feed is a single non-blocking Tell behind the sink, wrapped in try/catch so a faulting feed never blocks or breaks a deploy (same discipline as the provisioning hook). - Recorder.UpdateHistorizedRefs(added, removed) converges the tracked set, then — only when it actually changed — sends ONE RegisterInterest with the full set (the mux's RegisterInterest is a full-REPLACE) or one UnregisterInterest when it drains to empty (the mux has no per-ref unregister). An unchanged delta is a no-op (no mux churn). - DI: the recorder is now spawned BEFORE the applier so the adapter (ActorHistorizedTagSubscriptionSink) can wrap its IActorRef; the Null sink is used when continuous historization is off/unwired. Tests: recorder convergence (add-from-empty, add+remove converge, idempotent, drain-to-empty unregisters); applier feeds resolved added refs, removed+renamed deltas, and survives a throwing sink. Build clean (0 warnings on touched projects); Runtime/OpcUaServer/Gateway/AdminUI suites green. Claude-Session: https://claude.ai/code/session_012SDSQ3AcaXqPcBtDESBRii