"improving" pair handler clean up and some other stuff

LightlessSync/Services/TextureCompression/TextureDownscaleService.cs

@@ -77,16 +77,39 @@ public sealed class TextureDownscaleService
     }
 
     public void ScheduleDownscale(string hash, string filePath, TextureMapKind mapKind)
+        => ScheduleDownscale(hash, filePath, () => mapKind);
+
+    public void ScheduleDownscale(string hash, string filePath, Func<TextureMapKind> mapKindFactory)
     {
         if (!filePath.EndsWith(".tex", StringComparison.OrdinalIgnoreCase)) return;
         if (_activeJobs.ContainsKey(hash)) return;
 
         _activeJobs[hash] = Task.Run(async () =>
         {
+            TextureMapKind mapKind;
+            try
+            {
+                mapKind = mapKindFactory();
+            }
+            catch (Exception ex)
+            {
+                _logger.LogWarning(ex, "Failed to determine texture map kind for {Hash}; skipping downscale", hash);
+                return;
+            }
+
             await DownscaleInternalAsync(hash, filePath, mapKind).ConfigureAwait(false);
         }, CancellationToken.None);
     }
 
+    public bool ShouldScheduleDownscale(string filePath)
+    {
+        if (!filePath.EndsWith(".tex", StringComparison.OrdinalIgnoreCase))
+            return false;
+
+        var performanceConfig = _playerPerformanceConfigService.Current;
+        return performanceConfig.EnableNonIndexTextureMipTrim || performanceConfig.EnableIndexTextureDownscale;
+    }
+
     public string GetPreferredPath(string hash, string originalPath)
     {
         if (_downscaledPaths.TryGetValue(hash, out var existing) && File.Exists(existing))