fix: resolve 4 SonarQube code quality issues

src/Cake.Parallel/ParallelCakeEngine.cs

@@ -204,9 +204,9 @@
             }
         }
 
         private bool ShouldExecuteTask(ICakeContext context, CakeTask task, bool isTarget)
         {
             foreach (var criteria in task.Criterias)
             {
                 if (!criteria(context))
                 {
@@ -253,7 +253,7 @@
                 }
                 else
                 {
                     cts.Cancel();
                     throw;
                 }
             }
@@ -283,20 +283,23 @@
             report.AddSkipped(task.Name);
         }
 
         private bool isDelegatedTask(CakeTask task)
         {
             var actionTask = task as ActionTask;
 
             return actionTask != null && !actionTask.Actions.Any();
         }
 
         private void ReportErrors(IExecutionStrategy strategy, Action<Exception> errorReporter, Exception taskException)
         {
             try
             {
                 strategy.ReportErrors(errorReporter, taskException);
             }
-            catch { }
+            catch
+            {
+                // Intentionally suppressed: if error reporting itself fails, there is nothing more we can do.
+            }
         }
 
         private void HandleErrors(IExecutionStrategy strategy, Action<Exception> errorHandler, Exception exception)

src/Cake.Parallel/ParallelGraphBuilder.cs

@@ -8,7 +8,7 @@
 
 namespace Cake.Parallel.Module
 {
-    public class ParallelGraphBuilder
+    public static class ParallelGraphBuilder
     {
         public static CakeGraph Build(List<CakeTask> tasks)
         {

src/Cake.Parallel/ParallelGraphExtensions.cs

@@ -51,7 +51,7 @@ private static async Task Traverse(
             }
 
             // The below line does work correctly, but does not bubble up the TaskCanceledException
-            // await executeTask(nodeName, cancellationTokenSource).ConfigureAwait(false);
+
             await Task.Run(() => executeTask(nodeName, cancellationTokenSource), token).ConfigureAwait(false);
         }