添加 agent 掉线重连日志, 用来诊断 prod 环境掉线不自动重连的 bug

agent/src/main/java/cn/reghao/devops/agent/event/ws/WebSocketListenerImpl.java

@@ -57,7 +57,7 @@ public class WebSocketListenerImpl extends WebSocketListener {
 
     @Override
     public void onFailure(WebSocket webSocket, Throwable throwable, Response response) {
-        log.info("WebSocket 异常事件");
+        log.info("WebSocket 异常事件: {}", throwable.getMessage());
         if (throwable instanceof ConnectException) {
             wsClient.setConnected(false);
             if (wsClient.isRetry()) {