feat(client): AddComment + comment CLI, drop Galaxy-era alarm fallback, serialize CLI tests (#598); Client.Shared off obsolete sync SDK APIs (#621)

Claude-Session: https://claude.ai/code/session_01Ef2ozxS7QPanGT8uoATbTe

tests/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer.IntegrationTests/ClientAlarmMethodTests.cs

@@ -18,7 +18,7 @@ namespace ZB.MOM.WW.OtOpcUa.OpcUaServer.IntegrationTests;
 /// <remarks>
 ///     The condition id is passed exactly as a CLI user passes <c>--node</c>: the condition node's own id.
 ///     Each call must return Good <b>and</b> move the condition — read back from the condition events the
-///     server reports, not from the call result alone. The client exposes no AddComment API, so it is not covered.
+///     server reports, not from the call result alone. AddComment is covered on both the scripted and the native condition (the native one supports Acknowledge and AddComment only).
 /// </remarks>
 public sealed class ClientAlarmMethodTests
 {
@@ -66,6 +66,10 @@ public sealed class ClientAlarmMethodTests
                 conditionId, events.LatestEventId(item, "base"), "confirm", ct)).ShouldBeTrue();
             (await Next(++n))[RecordedEvents.ConfirmedField].Value.ShouldBe(true);
 
+            StatusCode.IsGood(await client.AddCommentAsync(
+                conditionId, events.LatestEventId(item, "base"), "note", ct)).ShouldBeTrue();
+            ((await Next(++n))[RecordedEvents.CommentField].Value as LocalizedText).ShouldNotBeNull().Text.ShouldBe("note");
+
             StatusCode.IsGood(await client.ShelveAlarmAsync(conditionId, ShelveKind.OneShot, 0, ct)).ShouldBeTrue();
             (await Next(++n))[RecordedEvents.ShelvingField].Value.ShouldBe(ObjectIds.ShelvedStateMachineType_OneShotShelved);
 
@@ -120,6 +124,12 @@ public sealed class ClientAlarmMethodTests
             ack[RecordedEvents.ConfirmedField].Value.ShouldBe(true);
             ack[RecordedEvents.ShelvingField].Value.ShouldBe(ObjectIds.ShelvedStateMachineType_Unshelved);
 
+            StatusCode.IsGood(await client.AddCommentAsync(
+                conditionId, events.LatestEventId(item, "base"), "note", ct)).ShouldBeTrue();
+            await rig.DrainProjectionsAsync();
+            await RecordedEvents.WaitUntilAsync(() => events.ConditionEvents(item, "base").Count >= 3);
+            (events.ConditionEvents(item, "base")[2][RecordedEvents.CommentField].Value as LocalizedText).ShouldNotBeNull().Text.ShouldBe("note");
+
             await subscription.DeleteAsync(true, ct);
         }
         finally { await rig.DisposeAsync(); }