chore[log]: lower the log warning level

net/src/main/java/com/zfoo/net/handler/idle/ClientIdleHandler.java

@@ -39,7 +39,7 @@ public class ClientIdleHandler extends ChannelDuplexHandler {
         if (evt instanceof IdleStateEvent) {
             IdleStateEvent event = (IdleStateEvent) evt;
             if (event.state() == IdleState.ALL_IDLE) {
-                logger.warn("client sends heartbeat packet to {}", SessionUtils.sessionSimpleInfo(ctx));
+                logger.info("heartbeat client send to [sid:{}]", SessionUtils.getSession(ctx).getSid());
                 ctx.channel().writeAndFlush(heartbeatPacket);
             }
         }

net/src/main/java/com/zfoo/net/router/Router.java

@@ -78,7 +78,7 @@ public class Router implements IRouter {
     @Override
     public void receive(Session session, Object packet, @Nullable Object attachment) {
         if (packet.getClass() == Heartbeat.class) {
-            logger.info("heartbeat");
+            logger.info("heartbeat server receiver [sid:{}]", session.getSid());
             return;
         }