docs: fix comment typos in common utilities

[luojiyin1987]

⚠️ 提交说明 / PR Notice

Important

• 请提供人工撰写的简洁摘要，避免直接粘贴未经整理的 AI 输出。

📝 变更描述 / Description

发现两处源码注释存在明显拼写错误：

• common/go-channel.go: occured -> occurred
• common/utils.go: apppended -> appended

🚀 变更类型 / Type of change

• 🐛 Bug 修复 (Bug fix) - 请关联对应 Issue，避免将设计取舍、理解偏差或预期不一致直接归类为 bug
• ✨ 新功能 (New feature) - 重大特性建议先通过 Issue 沟通
• ⚡ 性能优化 / 重构 (Refactor)
• 📝 文档更新 (Documentation)

🔗 关联任务 / Related Issue

• Closes # (如有)

✅ 提交前检查项 / Checklist

• 人工确认: 我已亲自整理并撰写此描述，没有直接粘贴未经处理的 AI 输出。
• 非重复提交: 我已搜索现有的 Issues 与 PRs，确认不是重复提交。
• Bug fix 说明: 若此 PR 标记为 Bug fix，我已提交或关联对应 Issue，且不会将设计取舍、预期不一致或理解偏差直接归类为 bug。
• 变更理解: 我已理解这些更改的工作原理及可能影响。
• 范围聚焦: 本 PR 未包含任何与当前任务无关的代码改动。
• 本地验证: 已在本地运行并通过测试或手动验证，维护者可以据此复核结果。
• 安全合规: 代码中无敏感凭据，且符合项目代码规范。

📸 运行证明 / Proof of Work

(请在此粘贴截图、关键日志或测试报告，以证明变更生效)

这不影响运行时行为，但会影响注释可读性。

复现步骤

1. 打开 common/go-channel.go
2. 查看 SafeSendBool / SafeSendString / SafeSendStringTimeout 附近注释
3. 打开 common/utils.go
4. 查看 SaveTmpFile 注释

预期结果

注释拼写正确，且不引入任何逻辑变更。

相关截图

无，属于纯文本注释修正。

Summary by CodeRabbit

• Documentation
  • Corrected minor typos in code documentation and comments.

[coderabbitai]

Walkthrough

This pull request corrects spelling and grammar errors in comments and public documentation across two utility files. Three deferred recovery blocks in channel-send helper functions (SafeSendBool, SafeSendString, SafeSendStringTimeout) are updated to fix the typo "occured" to "occurred", while the SaveTmpFile function's public documentation comment is improved for clarity regarding filename formatting.

Documentation and Comment Corrections

Layer / File(s)	Summary
Typo corrections in comments and docs common/go-channel.go, common/utils.go	Corrected spelling "occured" to "occurred" in three panic-recovery comments within channel helper functions; improved SaveTmpFile public documentation comment accuracy regarding filename appending. No code logic changes.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🐰 A hop through code, I found today,
Three typos misspelled in the channel's way,
"Occurred" now correct, the docs shine bright,
Small fixes that make the code just right! 🔧✨

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 40.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'docs: fix comment typos in common utilities' directly and accurately summarizes the main change—correcting spelling errors in source-code comments across two utility files.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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