Got at least one data fetching method working; turns out, we can't use a patched LogicStack to get the data

Vendor/EmbedIO-3.5.2/Files/Internal/MappedResourceInfoExtensions.cs

@@ -0,0 +1,8 @@
+namespace EmbedIO.Files.Internal
+{
+    internal static class MappedResourceInfoExtensions
+    {
+        public static string GetEntityTag(this MappedResourceInfo @this, CompressionMethod compressionMethod)
+            => EntityTag.Compute(@this.LastModifiedUtc, @this.Length, compressionMethod);
+    }
+}