move texture and model processing out of download thread and fix some normalization for weights

LightlessSync/Services/TextureProcessingQueue.cs

@@ -0,0 +1,19 @@
+using Microsoft.Extensions.Logging;
+
+namespace LightlessSync.Services;
+
+public sealed class TextureProcessingQueue : IDisposable
+{
+    private readonly AssetProcessingQueue _queue;
+
+    public TextureProcessingQueue(ILogger<TextureProcessingQueue> logger)
+    {
+        _queue = new AssetProcessingQueue(logger, "LightlessSync.TextureProcessing");
+    }
+
+    public Task Enqueue(Func<CancellationToken, Task> work, CancellationToken token = default)
+        => _queue.Enqueue(work, token);
+
+    public void Dispose()
+        => _queue.Dispose();
+}