Gap 1 of phase-7-status.md. Intercepts AcknowledgeableConditionType_Acknowledge and AcknowledgeableConditionType_Confirm calls in DriverNodeManager.Call and dispatches them to ScriptedAlarmEngine so OPC UA HMI clients can acknowledge/confirm scripted alarms in addition to the existing Admin UI path. Shelve methods deferred (per-instance NodeIds, not well-known type MethodIds — follow-up task). AlarmEngine is now exposed through Phase7ComposedSources so the server wire-up passes it to every DriverNodeManager. 13 new unit tests cover dispatch kernel, identity fallback, batch handling, and error paths. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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