Add clarifying code comment on why a CancellationToken is passed in the cancelled state

Author: ramonsmits

src/ServiceControl.Audit/Auditing/AuditIngestion.cs

@@ -185,6 +185,9 @@ async Task EnsureStopped(CancellationToken cancellationToken)
             try
             {
                 await startStopSemaphore.WaitAsync(cancellationToken);
+
+                // By passing a CancellationToken in the cancelled state we stop receivers ASAP and
+                // still correctly stop/shutdown
                 await StopAndTeardownInfrastructure(new CancellationToken(canceled: true));
             }
             finally

src/ServiceControl/Operations/ErrorIngestion.cs

@@ -293,6 +293,9 @@ async Task EnsureStopped(CancellationToken cancellationToken = default)
             try
             {
                 await startStopSemaphore.WaitAsync(cancellationToken);
+
+                // By passing a CancellationToken in the cancelled state we stop receivers ASAP and
+                // still correctly stop/shutdown
                 await StopAndTeardownInfrastructure(new CancellationToken(canceled: true));
             }
             finally