fix(dotnet-client): no ack retry, caller-owned channels, safe session dispose, typed diagnostics, AttachSession

clients/dotnet/ZB.MOM.WW.MxGateway.Client.Tests/MxGatewayClientAlarmsTests.cs

@@ -81,24 +81,22 @@ public sealed class MxGatewayClientAlarmsTests
     [Fact]
     public async Task AcknowledgeAlarmAsync_HonorsCancellation()
     {
-        // Acks are routed through the safe-unary retry pipeline (idempotent at the
-        // MxAccess level), so the transport-side cancellation token is a linked one
-        // rather than the caller's original. Verify cancellation by tripping the source
-        // and asserting the call observes it.
+        // Acks bypass the retry pipeline (non-idempotent), so the caller's token
+        // reaches the transport unchanged.
         using CancellationTokenSource cancellation = new();
-        cancellation.Cancel();
         FakeGatewayTransport transport = CreateTransport();
         await using MxGatewayClient client = CreateClient(transport);
 
-        await Assert.ThrowsAnyAsync<OperationCanceledException>(() =>
-            client.AcknowledgeAlarmAsync(
-                new AcknowledgeAlarmRequest
-                {
-                    AlarmFullReference = "Tank01.Level.HiHi",
-                    Comment = string.Empty,
-                    OperatorUser = "alice",
-                },
-                cancellation.Token));
+        await client.AcknowledgeAlarmAsync(
+            new AcknowledgeAlarmRequest
+            {
+                AlarmFullReference = "Tank01.Level.HiHi",
+                Comment = string.Empty,
+                OperatorUser = "alice",
+            },
+            cancellation.Token);
+
+        Assert.Equal(cancellation.Token, Assert.Single(transport.AcknowledgeAlarmCalls).CallOptions.CancellationToken);
     }
 
     /// <summary>AcknowledgeAlarmAsync maps unauthenticated RPC exception to typed exception.</summary>