Migrates the notifications service to use ASP.NET MVC framework

Jellyfin.Server/Extensions/ApiServiceCollectionExtensions.cs

@@ -71,6 +71,7 @@ namespace Jellyfin.Server.Extensions
                 // Clear app parts to avoid other assemblies being picked up
                 .ConfigureApplicationPartManager(a => a.ApplicationParts.Clear())
                 .AddApplicationPart(typeof(StartupController).Assembly)
+                .AddApplicationPart(typeof(NotificationsController).Assembly)
                 .AddControllersAsServices();
         }