fix: confirm email changes and enforce clean backend build

backend/src/Socialize.Api/Modules/CalendarIntegrations/Services/CalendarImportBackgroundService.cs

@@ -23,12 +23,15 @@ internal sealed class CalendarImportBackgroundService(
             CalendarImportSyncService syncService = scope.ServiceProvider.GetRequiredService<CalendarImportSyncService>();
             await syncService.RefreshDueSourcesAsync(stoppingToken);
         }
-        catch (OperationCanceledException) when (stoppingToken.IsCancellationRequested)
+        catch (OperationCanceledException ex) when (stoppingToken.IsCancellationRequested)
         {
+            logger.LogDebug(ex, "Calendar import background sync stopped.");
         }
+#pragma warning disable CA1031 // Background service should log and continue after unexpected sync failures.
         catch (Exception ex)
         {
             logger.LogError(ex, "Calendar import background sync failed.");
         }
+#pragma warning restore CA1031
     }
 }