Floatplane channel plugin for Jellyfin 10.10.x: browse, HLS proxy, cookie session, CI release

- IChannel: creators -> sub-channels -> video posts (public listing API, search mapped)
- IRequiresMediaInfoCallback -> signed proxy URLs; stream controller rewrites HLS so the
  AES-128 key is fetched server-side with the session cookie, segments stay on the CDN
- delivery/info cached per token lifetime and throttled (~2/min)
- config page: paste sails.sid + validate, extra creators, quality, search test
- scripts/package.sh -> plugin folder + zip + md5 + manifest.json; Gitea release workflow
- research docs, HAR analysis (HAR itself gitignored), install-pi5.sh

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

doc/research/reference-sources/chaosflix/Jellyfin.Plugin.Chaosflix/ChaosflixServiceRegistrator.cs

@@ -0,0 +1,37 @@
+using System.Net.Http;
+using Jellyfin.Plugin.Chaosflix.Api;
+using Jellyfin.Plugin.Chaosflix.Channel;
+using MediaBrowser.Controller;
+using MediaBrowser.Controller.Channels;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Controller.Plugins;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Jellyfin.Plugin.Chaosflix;
+
+/// <summary>
+/// Registers plugin services in the DI container.
+/// </summary>
+public class ChaosflixServiceRegistrator : IPluginServiceRegistrator
+{
+    /// <inheritdoc />
+    public void RegisterServices(IServiceCollection serviceCollection, IServerApplicationHost applicationHost)
+    {
+        // Redirect resolution needs the 302 itself, not the mirror behind it.
+        serviceCollection
+            .AddHttpClient(CccApiClient.RedirectClientName)
+            .ConfigurePrimaryHttpMessageHandler(() => new HttpClientHandler { AllowAutoRedirect = false });
+
+        serviceCollection.AddSingleton<CccApiClient>();
+
+        // The status endpoint reports this channel's caches, so it has to reach the very
+        // instance Jellyfin serves from — registering the class twice would give it a
+        // second one with empty caches.
+        serviceCollection.AddSingleton<ChaosflixChannel>();
+        serviceCollection.AddSingleton<IChannel>(sp => sp.GetRequiredService<ChaosflixChannel>());
+        // Jellyfin collects the similar-items providers out of the container, the same
+        // way it collects channels.
+        serviceCollection.AddSingleton<ISimilarItemsProvider, ChaosflixSimilarItems>();
+        serviceCollection.AddHostedService<ChaosflixUserDataMirror>();
+    }
+}