fix: stop tick room on delete

Ragon.Server/Sources/Lobby/RagonLobbyInMemory.cs

@@ -1,5 +1,5 @@
 /*
- * Copyright 2023 Eduard Kargin <kargin.eduard@gmail.com>
+ * Copyright 2023-2024 Eduard Kargin <kargin.eduard@gmail.com>
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -75,6 +75,8 @@ public class LobbyInMemory : IRagonLobby
 
   public void Persist(RagonRoom room)
   {
+    room.Attach();
+    
     _rooms.Add(room);
     _logger.Trace($"New room: {room.Id}");
     
@@ -87,6 +89,8 @@ public class LobbyInMemory : IRagonLobby
     var result = false;
     if (room.Players.Count == 0)
     {
+      room.Detach();
+      
       _rooms.Remove(room);
       _logger.Trace($"Room {room.Id} removed");