feat(alarms): carry AlarmTypeName + operator Comment on AlarmTransitionEvent (historian feed prep)

tests/Server/ZB.MOM.WW.OtOpcUa.Runtime.Tests/ScriptedAlarms/ScriptedAlarmHostActorTests.cs

@@ -173,6 +173,10 @@ public sealed class ScriptedAlarmHostActorTests : RuntimeActorTestBase
         evt.TransitionKind.ShouldBe("Activated");
         evt.Severity.ShouldBe(1000); // 800 → Critical bucket → 1000
         evt.User.ShouldBe("system");
+        // Historian feed prep: the Part-9 subtype rides along (Plan's AlarmType "AlarmCondition"
+        // parses to AlarmKind.AlarmCondition); an engine-driven Activated transition has no comment.
+        evt.AlarmTypeName.ShouldBe("AlarmCondition");
+        evt.Comment.ShouldBeNull();
     }
 
     /// <summary>Clear path: after activating, pushing a value below the threshold drives Active→Inactive
@@ -306,6 +310,9 @@ public sealed class ScriptedAlarmHostActorTests : RuntimeActorTestBase
         var evt = alerts.FishForMessage<AlarmTransitionEvent>(e => e.TransitionKind == "Acknowledged", Timeout);
         evt.AlarmId.ShouldBe("alm-1");
         evt.User.ShouldBe("alice");
+        // Historian feed prep: the operator's ack comment threads through to the transition event.
+        evt.Comment.ShouldBe("ack-note");
+        evt.AlarmTypeName.ShouldBe("AlarmCondition");
     }
 
     /// <summary>Ownership filter: an AlarmCommand for an AlarmId this host's engine does NOT own is ignored