Minor fix to TAR extraction

Author: floeschau

src/Stars.Services/Processing/TarArchiveAsset.cs

@@ -147,7 +147,10 @@ public Task<IDictionary<string, IAsset>> ExtractTarAsync(Stream tarStream,
                         blockingStream.Close();
                     }, null, TaskCreationOptions.AttachedToParent);
 
-                    extractedAssets.Add(name, tarEntryAction(tarEntryAsset, destination, carrierManager, ct).GetAwaiter().GetResult());
+                    if (!name.Contains("/@") && !extractedAssets.ContainsKey(name))
+                    {
+                        extractedAssets.Add(name, tarEntryAction(tarEntryAsset, destination, carrierManager, ct).GetAwaiter().GetResult());
+                    }
 
                     if (!extractTask.IsCompleted)
                     {