add possible solution for later

feat/PluginServiceRegistrator.cs

@@ -0,0 +1,18 @@
+using MediaBrowser.Controller;
+using MediaBrowser.Controller.Plugins;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Jellyfin.Plugin.Seasonals;
+
+/// <summary>
+/// Registers plugin services.
+/// </summary>
+public class PluginServiceRegistrator : IPluginServiceRegistrator
+{
+    /// <inheritdoc />
+    public void RegisterServices(IServiceCollection serviceCollection, IServerApplicationHost applicationHost)
+    {
+        serviceCollection.AddTransient<IStartupFilter, ScriptInjectionStartupFilter>();
+    }
+}