refactor(worker): alarm consumers resolve the AckMsg item instead of acking

IMxAccessAlarmConsumer.ResolveAckTarget/ResolveAckTargetByName replace AcknowledgeByGuid/AcknowledgeByName. wnwrap maps Galaxy-provider alarms to <tag>.AckMsg and drops its inert parallel ack consumer; subtag resolves to the target's AckCommentSubtag and no longer advises or writes it; ISubtagAlarmSource.Write is removed. Does not build alone: AlarmDispatcher moves to the new API in the next commit.

Claude-Session: https://claude.ai/code/session_016J6isfcgqy4SB2RK3ZvFvT

src/ZB.MOM.WW.MxGateway.Worker/MxAccess/IMxAccessAlarmConsumer.cs

@@ -49,51 +49,19 @@ public interface IMxAccessAlarmConsumer : IDisposable
     void Subscribe(string subscription);
 
     /// <summary>
-    ///     Acknowledges a single alarm with full operator-identity fidelity.
-    ///     Reaches AVEVA's native <c>AlarmAckByGUID</c>; operator
-    ///     user / node / domain / full-name and the comment land atomically
-    ///     with the ack transition in the alarm-history log.
+    ///     Resolves the MXAccess item whose write acknowledges the alarm with the
+    ///     given GUID (e.g. <c>Obj.Alarm.AckMsg</c>). Does not perform the ack.
     /// </summary>
-    /// <param name="alarmGuid">The alarm GUID.</param>
-    /// <param name="ackComment">The acknowledgment comment.</param>
-    /// <param name="ackOperatorName">The operator name.</param>
-    /// <param name="ackOperatorNode">The operator node.</param>
-    /// <param name="ackOperatorDomain">The operator domain.</param>
-    /// <param name="ackOperatorFullName">The operator full name.</param>
-    /// <returns>The AVEVA-native status code.</returns>
-    int AcknowledgeByGuid(
-        Guid alarmGuid,
-        string ackComment,
-        string ackOperatorName,
-        string ackOperatorNode,
-        string ackOperatorDomain,
-        string ackOperatorFullName);
+    /// <param name="alarmGuid">The alarm GUID as reported by this consumer.</param>
+    /// <returns>The resolved target or the reason none exists.</returns>
+    AlarmAckTarget ResolveAckTarget(Guid alarmGuid);
 
-    /// <summary>
-    ///     Acknowledge a single alarm by its (name, provider, group) tuple.
-    ///     Reaches AVEVA's <c>AlarmAckByName</c> on
-    ///     <c>wwAlarmConsumerClass</c>; same alarm-history outcome as
-    ///     <see cref="AcknowledgeByGuid"/>, used when the caller has the
-    ///     human-readable reference but not the canonical GUID.
-    /// </summary>
-    /// <param name="alarmName">The alarm name.</param>
-    /// <param name="providerName">The provider name.</param>
-    /// <param name="groupName">The group name.</param>
-    /// <param name="ackComment">The acknowledgment comment.</param>
-    /// <param name="ackOperatorName">The operator name.</param>
-    /// <param name="ackOperatorNode">The operator node.</param>
-    /// <param name="ackOperatorDomain">The operator domain.</param>
-    /// <param name="ackOperatorFullName">The operator full name.</param>
-    /// <returns>The AVEVA-native status code.</returns>
-    int AcknowledgeByName(
-        string alarmName,
-        string providerName,
-        string groupName,
-        string ackComment,
-        string ackOperatorName,
-        string ackOperatorNode,
-        string ackOperatorDomain,
-        string ackOperatorFullName);
+    /// <summary>Resolves the ack item for an alarm identified by name, provider and group.</summary>
+    /// <param name="alarmName">The tag/alarm name, e.g. <c>TestMachine_001.TestAlarm001</c>.</param>
+    /// <param name="providerName">The provider (literal <c>Galaxy</c> for ArchestrA).</param>
+    /// <param name="groupName">The area/group.</param>
+    /// <returns>The resolved target or the reason none exists.</returns>
+    AlarmAckTarget ResolveAckTargetByName(string alarmName, string providerName, string groupName);
 
     /// <summary>
     ///     Returns the consumer's most recently parsed snapshot of currently