Fix in-process restart (#16482)

Fix in-process restart

Emby.Server.Implementations/IO/LibraryMonitor.cs

@@ -60,6 +60,7 @@ namespace Emby.Server.Implementations.IO
             _fileSystem = fileSystem;
 
             appLifetime.ApplicationStarted.Register(Start);
+            appLifetime.ApplicationStopping.Register(Stop);
         }
 
         /// <inheritdoc />

Jellyfin.Server/Program.cs

@@ -161,7 +161,6 @@ namespace Jellyfin.Server
                             _loggerFactory,
                             options,
                             startupConfig);
-            _appHost = appHost;
             var configurationCompleted = false;
             try
             {
@@ -207,6 +206,7 @@ namespace Jellyfin.Server
                 await jellyfinMigrationService.MigrateStepAsync(JellyfinMigrationStageTypes.CoreInitialisation, appHost.ServiceProvider).ConfigureAwait(false);
 
                 await appHost.InitializeServices(startupConfig).ConfigureAwait(false);
+                _appHost = appHost;
 
                 await jellyfinMigrationService.MigrateStepAsync(JellyfinMigrationStageTypes.AppInitialisation, appHost.ServiceProvider).ConfigureAwait(false);
                 await jellyfinMigrationService.CleanupSystemAfterMigration(_logger).ConfigureAwait(false);
@@ -263,6 +263,7 @@ namespace Jellyfin.Server
 
                 _appHost = null;
                 _jellyfinHost?.Dispose();
+                _jellyfinHost = null;
             }
         }
 

Jellyfin.Server/ServerSetupApp/SetupServer.cs

@@ -142,6 +142,7 @@ public sealed class SetupServer : IDisposable
         ThrowIfDisposed();
         var retryAfterValue = TimeSpan.FromSeconds(5);
         var config = _configurationManager.GetNetworkConfiguration()!;
+        _startupServer?.Dispose();
         _startupServer = Host.CreateDefaultBuilder(["hostBuilder:reloadConfigOnChange=false"])
             .UseConsoleLifetime()
             .UseSerilog()