refactor(Hotfix): 优化心跳消息处理并使用对象池

- 使用MessageObjectPoolHelper获取ReqActorHeartBeat对象，避免重复创建
- 添加心跳消息检查，避免处理不必要的心跳消息
- 调用基类方法处理非心跳消息

Author: AlianBlank

GameFrameX.Hotfix/StartUp/AppStartUpHotfixGameByDiscoveryCenter.cs

@@ -53,16 +53,22 @@ protected override void GameAppClientOnConnected()
         Send(reqRegisterServer);
     }
 
-    readonly ReqActorHeartBeat _reqActorHeartBeat = new ReqActorHeartBeat();
 
     protected override MessageObject GameAppClientOnHeartBeat()
     {
-        _reqActorHeartBeat.Timestamp = TimeHelper.UnixTimeMilliseconds();
-        _reqActorHeartBeat.UpdateUniqueId();
-        return _reqActorHeartBeat;
+        var reqActorHeartBeat = MessageObjectPoolHelper.Get<ReqActorHeartBeat>();
+        reqActorHeartBeat.Timestamp = TimeHelper.UnixTimeMilliseconds();
+        reqActorHeartBeat.UpdateUniqueId();
+        return reqActorHeartBeat;
     }
 
     protected override void GameAppClientOnMessage(MessageObject message)
     {
+        if (MessageProtoHelper.IsHeartbeat(message))
+        {
+            return;
+        }
+
+        base.GameAppClientOnMessage(message);
     }
 }