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 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;
+            var audioFolderKey = executeContext.Arguments.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();
-            }
 
             if (string.IsNullOrWhiteSpace(audioFolderKey))
             {

Infrastructure/MassTransit/Arguments/UpdateTrackAudioArguments.cs

@@ -2,5 +2,5 @@
 {
     public record UpdateTrackAudioArguments(
         Guid TrackId,
-        string AudioFolderKeyVariable);
+        string AudioFolderKey);
 }

Infrastructure/MassTransit/RoutingSlip/Builders/AudioWorkflowRoutingSlipBuilder.cs

@@ -58,7 +58,7 @@ namespace Musify.Infrastructure.MassTransit.RoutingSlip.Builders
                 EndpointHelper.BuildExecuteActivityUri(UpdateTrackAudioActivity.ExecuteEndpointName),
                 new UpdateTrackAudioArguments(
                     message.TrackId,
-                   RoutingSlipVariableNames.Audio.TranscodedDirectory));
+                    message.DestinationFolderKey));
 
             return routingSlipBuilder;
         }