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/WebModuleContainerExtensions-Routing.cs

@@ -0,0 +1,51 @@
+using EmbedIO.Routing;
+using EmbedIO.Utilities;
+using System;
+
+namespace EmbedIO
+{
+    partial class WebModuleContainerExtensions
+    {
+        /// <summary>
+        /// Creates an instance of <see cref="RoutingModule"/> and adds it to a module container.
+        /// </summary>
+        /// <typeparam name="TContainer">The type of the module container.</typeparam>
+        /// <param name="this">The <typeparamref name="TContainer"/> on which this method is called.</param>
+        /// <param name="baseRoute">The base route of the module.</param>
+        /// <param name="configure">A callback used to configure the newly-created <see cref="RoutingModule"/>.</param>
+        /// <returns><paramref name="this"/> with a <see cref="RoutingModule"/> added.</returns>
+        /// <exception cref="NullReferenceException"><paramref name="this"/> is <see langword="null"/>.</exception>
+        /// <exception cref="ArgumentNullException"><paramref name="configure"/> is <see langword="null"/>.</exception>
+        /// <seealso cref="RoutingModule"/>
+        /// <seealso cref="RoutingModuleExtensions"/>
+        /// <seealso cref="IWebModuleContainer.Modules"/>
+        /// <seealso cref="IComponentCollection{T}.Add"/>
+        public static TContainer WithRouting<TContainer>(this TContainer @this, string baseRoute, Action<RoutingModule> configure)
+            where TContainer : class, IWebModuleContainer
+            => WithRouting(@this, null, baseRoute, configure);
+
+        /// <summary>
+        /// Creates an instance of <see cref="RoutingModule"/> and adds it to a module container,
+        /// giving it the specified <paramref name="name"/> if not <see langword="null"/>.
+        /// </summary>
+        /// <typeparam name="TContainer">The type of the module container.</typeparam>
+        /// <param name="this">The <typeparamref name="TContainer"/> on which this method is called.</param>
+        /// <param name="name">The name.</param>
+        /// <param name="baseRoute">The base route of the module.</param>
+        /// <param name="configure">A callback used to configure the newly-created <see cref="RoutingModule"/>.</param>
+        /// <returns><paramref name="this"/> with a <see cref="RoutingModule"/> added.</returns>
+        /// <exception cref="NullReferenceException"><paramref name="this"/> is <see langword="null"/>.</exception>
+        /// <exception cref="ArgumentNullException"><paramref name="configure"/> is <see langword="null"/>.</exception>
+        /// <seealso cref="RoutingModule"/>
+        /// <seealso cref="RoutingModuleExtensions"/>
+        /// <seealso cref="IWebModuleContainer.Modules"/>
+        /// <seealso cref="IComponentCollection{T}.Add"/>
+        public static TContainer WithRouting<TContainer>(this TContainer @this, string? name, string baseRoute, Action<RoutingModule> configure)
+            where TContainer : class, IWebModuleContainer
+        {
+            configure = Validate.NotNull(nameof(configure), configure);
+            var module = new RoutingModule(baseRoute);
+            return WithModule(@this, name, module, configure);
+        }
+    }
+}