Change [Conditional("DEBUG")] to [Conditional("CHECKED")] in DebugCheck methods

Co-authored-by: marcschier <11168470+marcschier@users.noreply.github.com>

Author: Copilot

Stack/Opc.Ua.Types/Diagnostics/TelemetryExtensions.cs

@@ -149,7 +149,7 @@ public static Func<ITelemetryContext> InternalOnly__TelemetryHook
         /// us to weed out areas that need telemetry plumbed through.
         /// </summary>
         /// <param name="telemetry">The telemetry context to use</param>
-        [Conditional("DEBUG")]
+        [Conditional("CHECKED")]
         private static void DebugCheck(ITelemetryContext? telemetry)
         {
             DebugLog.Instance.CollectIf(telemetry == null);

Stack/Opc.Ua.Types/Diagnostics/TelemetryUtils.cs

@@ -138,7 +138,7 @@ public void Dispose()
                 }
             }
 
-            [Conditional("DEBUG")]
+            [Conditional("CHECKED")]
             private static void DebugCheck()
             {
                 Debug.Fail("Using a NullLogger");