feat(worker): add opt-in managed GUID alarm-ack path

Adds a managed acknowledge path over AVEVA's modern alarm client so GUID
acks carry full operator identity (domain + full name) and work on builds
where the wnwrap COM AlarmAckByGUID is E_NOTIMPL. Default off; opt in with
MXGATEWAY_USE_MANAGED_ALARM_ACK=1 (wnwrap behavior unchanged otherwise).

- AaManagedAlarmAckConsumer: reflection wrapper over
  aaAlarmManagedClient.AlarmClient (InitializeConsumer/RegisterConsumer/
  Subscribe/AlarmAckByGUID); EnvGatedFactory degrades to null (wnwrap) if the
  DLL can't load, so alarm reads never break.
- IManagedAlarmAckClient seam. AlarmDispatcher takes an optional client and
  routes GUID acks to it (subscribing + disposing it alongside the reader).
- AlarmCommandHandler gains an optional managedAckFactory; WorkerPipeSession
  wires AaManagedAlarmAckConsumer.EnvGatedFactory at the production sites.
- WnalNativeAckConsumer: confirmed native alarmlst.dll WNAL submit layer
  (WNALalarmReqSetText / WNALUserRequest / WNALUserRequestEx + lpAlmAck
  layout). List acquisition is intentionally not hand-rolled: the alarm-record
  layout and selection semantics are provider-defined and not recoverable from
  alarmlst.dll, so inferring them risks acking the wrong alarm.
- AlarmManagedGuidAckLiveSmokeTests: skip-gated live smoke that pulls a real
  (non-degraded) alarm GUID and asserts the ack APPLIES (Acknowledge
  transition / acked snapshot), not merely rc=0.

By-name acks stay on wnwrap (AlarmClient has no AlarmAckByName). Grounded in
static RE of alarmlst.dll, aaAlarmManagedClient.dll and alarmmgr.exe.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/ZB.MOM.WW.MxGateway.Worker/Ipc/WorkerPipeSession.cs

@@ -76,7 +76,7 @@ public sealed class WorkerPipeSession
             options,
             () => Process.GetCurrentProcess().Id,
             new WorkerPipeSessionOptions(),
-            () => new MxAccessStaSession((eq, affinity, comFactory) => new AlarmCommandHandler(eq, () => new WnWrapAlarmConsumer(), affinity, comFactory, standbyFactory: null)),
+            () => new MxAccessStaSession((eq, affinity, comFactory) => new AlarmCommandHandler(eq, () => new WnWrapAlarmConsumer(), affinity, comFactory, standbyFactory: null, managedAckFactory: AaManagedAlarmAckConsumer.EnvGatedFactory)),
             logger,
             stream)
     {
@@ -98,7 +98,7 @@ public sealed class WorkerPipeSession
             options,
             processIdProvider,
             new WorkerPipeSessionOptions(),
-            () => new MxAccessStaSession((eq, affinity, comFactory) => new AlarmCommandHandler(eq, () => new WnWrapAlarmConsumer(), affinity, comFactory, standbyFactory: null)),
+            () => new MxAccessStaSession((eq, affinity, comFactory) => new AlarmCommandHandler(eq, () => new WnWrapAlarmConsumer(), affinity, comFactory, standbyFactory: null, managedAckFactory: AaManagedAlarmAckConsumer.EnvGatedFactory)),
             logger: null)
     {
     }
@@ -1585,7 +1585,7 @@ public sealed class WorkerPipeSession
         // parameterless CompleteStartupHandshakeAsync is used without a
         // prior factory call.
         _runtimeSession ??= new MxAccessStaSession(
-            (eq, affinity, comFactory) => new AlarmCommandHandler(eq, () => new WnWrapAlarmConsumer(), affinity, comFactory, standbyFactory: null));
+            (eq, affinity, comFactory) => new AlarmCommandHandler(eq, () => new WnWrapAlarmConsumer(), affinity, comFactory, standbyFactory: null, managedAckFactory: AaManagedAlarmAckConsumer.EnvGatedFactory));
         IWorkerRuntimeSession session = _runtimeSession;
         try
         {