执行bg命令后退出当前session

- [x] 我已经在 [issues](https://github.com/alibaba/arthas/issues) 里搜索，没有重复的issue。

### 环境信息

* `arthas-boot.jar` 或者 `as.sh` 的版本： v4.0.4
* Arthas 版本: v4.0.4
* 操作系统版本: win11
* 目标进程的JVM版本: jdk8
* 执行`arthas-boot`的版本: v4.0.4

### 重现问题的步骤

1. 执行命令: trace cn.com.beautyfarm.controller.SysUserController list &
2. 执行命令: jobs (获取后台运行id)
3. 执行命令: fg id号
4. 按下按键: ctrl+z
5. 执行命令: bg id号

### 期望的结果
该trace任务在后台继续运行,命令行窗口可以继续停留在arthas命令行控制界面

### 实际运行的结果

```
[10]*
Stopped trace cn.com.beautyfarm.controller.SysUserController list &
execution count : 3
start time : Sun Jan 19 00:11:18 CST 2025
timeout date : Mon Jan 20 00:11:18 CST 2025
session : 2907be26-1e14-4812-a651-f5f78eac3b03 (current)
[arthas@10304]$ bg 10
[arthas@10304]$ [10]*
Running trace cn.com.beautyfarm.controller.SysUserController list &
execution count : 3
start time : Sun Jan 19 00:11:18 CST 2025
timeout date : Mon Jan 20 00:11:18 CST 2025
session : 2907be26-1e14-4812-a651-f5f78eac3b03 (current)

Connection to host lost.

D:\arthas>
```

在发生以上问题后,我使用telnet localhost 3658 重新建立连接后, 查看jobs,任务仍在运行. 再次执行fg命令,提示:
```
[arthas@10304]$ jobs
[10]
Running trace cn.com.beautyfarm.controller.SysUserController list &
execution count : 3
start time : Sun Jan 19 00:11:18 CST 2025
timeout date : Mon Jan 20 00:11:18 CST 2025
session : 2907be26-1e14-4812-a651-f5f78eac3b03
[arthas@10304]$ fg 10
job 10 doesn't belong to this session, so can not fg it
```

Start by tracing the CLI handling for the `bg` command and session ownership of jobs. Reproduce the listed Windows/JDK 8 sequence with `trace`, `jobs`, `fg`, Ctrl-Z, and `bg`; done means the Arthas prompt remains connected and the job can be brought to the foreground in the appropriate session.

Written by the indexing model from the issue text.