worker(alarms): WriteRecord as class not positional record (net48 has no IsExternalInit)

src/ZB.MOM.WW.MxGateway.Worker.Tests/MxAccess/LmxSubtagAlarmSourceTests.cs

@@ -204,6 +204,23 @@ public sealed class LmxSubtagAlarmSourceTests
         {
         }
 
-        internal sealed record WriteRecord(int ServerHandle, int ItemHandle, object? Value, int UserId);
+        internal sealed class WriteRecord
+        {
+            public WriteRecord(int serverHandle, int itemHandle, object? value, int userId)
+            {
+                ServerHandle = serverHandle;
+                ItemHandle = itemHandle;
+                Value = value;
+                UserId = userId;
+            }
+
+            public int ServerHandle { get; }
+
+            public int ItemHandle { get; }
+
+            public object? Value { get; }
+
+            public int UserId { get; }
+        }
     }
 }