Read-only mirror of native alarm sources into a unified A&C-style state
model (severity + active/acked/shelved/suppressed). Instance-bound source
discovery, site-only SQLite state with live central query (no central
tables), DebugView enrichment. OPC UA A&C events + ConditionRefresh and
MxGateway session-less StreamAlarms via a new IAlarmSubscribableConnection
seam routed connection-level by source reference; new NativeAlarmActor peer
to computed AlarmActor.
Joseph Doherty