[Feature] 授权凭据增加连接测试

### Description / 功能描述

功能我已经开发开发了 不知道是否能提交pr合并

### Motivation / 请求动机

在添加主机ssh 时候有时候不知道自己连的主机是否通,只有到了运行工作流时才发现,于是想添加测试验证连接.

### Miscellaneous / 其他

_No response_

### Contribution / 贡献代码

- [x] I am interested in contributing a PR for this! / 我乐意为此提交代码并发起 PR！

Start at the SSH host credential setup described in the issue and review the attached screenshots for the intended interaction. Trace how those credentials are used when a workflow runs, then define completion as a connection test that reports whether the configured host is reachable before workflow execution.

Written by the indexing model from the issue text.