Fix audio DASH workflow: dispose source stream before delete and store S3 folder key as AudioFolderName

Infrastructure/MassTransit/Activities/Audio/TranscodeDashAudioActivity.cs

@@ -38,11 +38,13 @@ namespace Musify.Infrastructure.MassTransit.Activities
 
             try
             {
-                await using var fileStream = File.OpenRead(sourceFilePath);
-                await audioTranscoder.TranscodeToDashAsync(
-                    fileStream,
-                    workingDirectory,
-                    executeContext.CancellationToken);
+                await using (var fileStream = File.OpenRead(sourceFilePath))
+                {
+                    await audioTranscoder.TranscodeToDashAsync(
+                        fileStream,
+                        workingDirectory,
+                        executeContext.CancellationToken);
+                }
 
                 File.Delete(sourceFilePath);
                 return executeContext.Completed();

Infrastructure/MassTransit/Activities/Audio/UpdateTrackAudioActivity.cs

@@ -31,17 +31,8 @@ namespace Musify.Infrastructure.MassTransit.Activities.Audio
                 throw;
             }
 
-            string? audioFolderKey;
-            try
-            {
-                audioFolderKey = executeContext.GetVariable<string>(executeContext.Arguments.AudioFolderKeyVariable);
-                logger.LogDebug("Resolved audio folder key: {AudioFolderKey}", audioFolderKey);
-            }
-            catch (Exception exception)
-            {
-                logger.LogWarning(exception, "Audio folder key variable could not be resolved for track {TrackId}", track.Id);
-                return executeContext.Completed();
-            }
+            var audioFolderKey = executeContext.Arguments.AudioFolderKey;
+            logger.LogDebug("Resolved audio folder key: {AudioFolderKey}", audioFolderKey);
 
             if (string.IsNullOrWhiteSpace(audioFolderKey))
             {