feat(debugview): DV-1 native-binding linkage on AlarmStateChanged contract chain

Add two additive init-only fields to AlarmStateChanged so the Debug View can
nest live native conditions under their configured source-binding node:
  - NativeSourceCanonicalName (binding canonical name, e.g. "Motor1.MotorAlarms")
  - IsConfiguredPlaceholder (quiet-binding placeholder flag; default false)

Flow on BOTH cross-process paths:
  - Live: proto AlarmStateUpdate fields 22/23 -> StreamRelayActor packs ->
    SiteStreamGrpcClient unpacks (regenerated SiteStreamGrpc/Sitestream.cs).
  - Snapshot (Newtonsoft): record defaults carry through; no special handling.

NativeAlarmActor.Emit now stamps NativeSourceCanonicalName = _source.CanonicalName.
Additive-only: no existing positional constructor or wire frame changed.

Tests: StreamRelayActorTests round-trips both fields pack->unpack;
NativeAlarmActorTests asserts the emitted event carries the binding canonical name.

src/ZB.MOM.WW.ScadaBridge.SiteRuntime/Actors/NativeAlarmActor.cs

@@ -330,7 +330,8 @@ public class NativeAlarmActor : ReceiveActor
             OperatorComment = t.OperatorComment,
             OriginalRaiseTime = t.OriginalRaiseTime,
             CurrentValue = t.CurrentValue,
-            LimitValue = t.LimitValue
+            LimitValue = t.LimitValue,
+            NativeSourceCanonicalName = _source.CanonicalName,
         };
 
         _instanceActor.Tell(change);