[utest][mailbox]: add standardized documentation for mailbox test

[ChuanN-sudo]

拉取/合并请求描述：(PR description)

Relates to #10895

为什么提交这份PR (why to submit this PR)

Add standardized documentation for Mailbox Test

你的解决方案是什么 (what is your solution)

请提供验证的bsp和config (provide the config and bsp)

• BSP:

• .config:

• action:

]

当前拉取/合并请求的状态 Intent for your PR

必须选择一项 Choose one (Mandatory):

• 本拉取/合并请求是一个草稿版本 This PR is for a code-review and is intended to get feedback
• 本拉取/合并请求是一个成熟版本 This PR is mature, and ready to be integrated into the repo

代码质量 Code Quality：

我在这个拉取/合并请求中已经考虑了 As part of this pull request, I've considered the following:

• 已经仔细查看过代码改动的对比 Already check the difference between PR and old code
• 代码风格正确，包括缩进空格，命名及其他风格 Style guide is adhered to, including spacing, naming and other styles
• 没有垃圾代码，代码尽量精简，不包含#if 0代码，不包含已经被注释了的代码 All redundant code is removed and cleaned up
• 所有变更均有原因及合理的，并且不会影响到其他软件组件代码或BSP All modifications are justified and not affect other components or BSP
• 对难懂代码均提供对应的注释 I've commented appropriately where code is tricky
• 代码是高质量的 Code in this PR is of high quality
• 已经使用formatting 等源码格式化工具确保格式符合RT-Thread代码规范 This PR complies with RT-Thread code specification
• 如果是新增bsp, 已经添加ci检查到.github/ALL_BSP_COMPILE.json 详细请参考链接BSP自查

[github-actions]

👋 感谢您对 RT-Thread 的贡献！Thank you for your contribution to RT-Thread!

为确保代码符合 RT-Thread 的编码规范，请在你的仓库中执行以下步骤运行代码格式化工作流（如果格式化CI运行失败）。
To ensure your code complies with RT-Thread's coding style, please run the code formatting workflow by following the steps below (If the formatting of CI fails to run).

---

🛠 操作步骤 | Steps

1. 前往 Actions 页面 | Go to the Actions page
   点击进入工作流 → | Click to open workflow →

2. 点击 Run workflow | Click Run workflow

• 设置需排除的文件/目录（目录请以"/"结尾）
  Set files/directories to exclude (directories should end with "/")
• 将目标分支设置为 \ Set the target branch to：add-mailbox-tc-comments
• 设置PR number为 \ Set the PR number to：10939

3. 等待工作流完成 | Wait for the workflow to complete
   格式化后的代码将自动推送至你的分支。
   The formatted code will be automatically pushed to your branch.

完成后，提交将自动更新至 add-mailbox-tc-comments 分支，关联的 Pull Request 也会同步更新。
Once completed, commits will be pushed to the add-mailbox-tc-comments branch automatically, and the related Pull Request will be updated.

如有问题欢迎联系我们，再次感谢您的贡献！💐
If you have any questions, feel free to reach out. Thanks again for your contribution!

[github-actions]

📌 Code Review Assignment

🏷️ Tag: kernel

Reviewers: GorrayLi ReviewSun hamburger-os lianux-mm wdfk-prog xu18838022837

Changed Files (Click to expand)

• src/utest/mailbox_tc.c

---

📊 Current Review Status (Last Updated: 2025-11-21 17:38 CST)

• ⌛ GorrayLi Pending Review
• ⌛ ReviewSun Pending Review
• ⌛ hamburger-os Pending Review
• ⌛ lianux-mm Pending Review
• ⌛ wdfk-prog Pending Review
• ⌛ xu18838022837 Pending Review

---

📝 Review Instructions

1. 维护者可以通过单击此处来刷新审查状态: 🔄 刷新状态
   Maintainers can refresh the review status by clicking here: 🔄 Refresh Status

2. 确认审核通过后评论 LGTM/lgtm
   Comment LGTM/lgtm after confirming approval

3. PR合并前需至少一位维护者确认
   PR must be confirmed by at least one maintainer before merging

ℹ️ 刷新CI状态操作需要具备仓库写入权限。
ℹ️ Refresh CI status operation requires repository Write permission.

[ChuanN-sudo]

@Rbb666 老师，自动检查通过了，麻烦您审核一下

[Copilot]

Pull Request Overview

This PR adds comprehensive standardized documentation for the RT-Thread mailbox unit test. The documentation follows a structured format to describe test objectives, scenarios, verification metrics, dependencies, and expected results.

Key Changes

• Added detailed test case documentation block with test objectives, scenarios, and verification metrics
• Documented mailbox API coverage and testing approach
• Specified hardware/software dependencies and expected test results

[Copilot]

🟡 PR Title Format Issue / PR 标题格式问题

English: PR title should follow the format: [module][subsystem] Description using lowercase brackets, not parentheses.

Current title: docs(utest):Add standardized documentation for Mailbox Test

Suggested title: [utest][mailbox] add standardized documentation for mailbox test

中文: PR 标题应遵循格式：使用小写方括号的 [模块][子系统] 描述，而不是圆括号。

当前标题: docs(utest):Add standardized documentation for Mailbox Test

建议标题: [utest][mailbox] add standardized documentation for mailbox test

[ChuanN-sudo]

已修改

[Copilot]

Spelling Error / 拼写错误

English: There is a typo in "amd" which should be "and".

Current: different scheduling policies amd allocation methods
Corrected: different scheduling policies and allocation methods

中文: "amd" 应为 "and"。

当前: different scheduling policies amd allocation methods
更正: different scheduling policies and allocation methods

Suggested change

	* - Validate mailbox core functionality under different scheduling policies amd allocation methods.
	* - Validate mailbox core functionality under different scheduling policies and allocation methods.

[ChuanN-sudo]

已修改

[Copilot]

Spelling/Formatting Error / 拼写/格式错误

English: There is an extra period at the end of the line creating a double period.

Current: Send-wait operations are verified to respect specified timeout values..
Corrected: Send-wait operations are verified to respect specified timeout values.

中文: 行尾有多余的句点，形成了双句点。

当前: Send-wait operations are verified to respect specified timeout values..
更正: Send-wait operations are verified to respect specified timeout values.

Suggested change

	* - Send-wait operations are verified to respect specified timeout values..
	* - Send-wait operations are verified to respect specified timeout values.

[ChuanN-sudo]

已修改