perf: 优化任务异常的内容

leopard-server/src/main/java/com/lanyuanxiaoyao/leopard/server/service/task/TaskMonitorNodes.java

@@ -1,5 +1,6 @@
 package com.lanyuanxiaoyao.leopard.server.service.task;
 
+import cn.hutool.core.exceptions.ExceptionUtil;
 import cn.hutool.core.util.ObjectUtil;
 import cn.hutool.core.util.StrUtil;
 import com.lanyuanxiaoyao.leopard.core.entity.Task;
@@ -63,7 +64,7 @@ public class TaskMonitorNodes {
       task.setFinishedTime(LocalDateTime.now());
       var exception = node.getSlot().getException();
       if (ObjectUtil.isNotNull(exception)) {
-        task.setError(exception.getMessage());
+        task.setError(ExceptionUtil.stacktraceToString(exception));
       }
       taskService.save(task);
     }