chore: bump version to 4.16.0

[Soulter]

Modifications / 改动点

• This is NOT a breaking change. / 这不是一个破坏性变更。

Screenshots or Test Results / 运行截图或测试结果

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Checklist / 检查清单

• 😊 如果 PR 中有新加入的功能，已经通过 Issue / 邮件等方式和作者讨论过。/ If there are new features added in the PR, I have discussed it with the authors through issues/emails, etc.
• 👀 我的更改经过了良好的测试，并已在上方提供了“验证步骤”和“运行截图”。/ My changes have been well-tested, and "Verification Steps" and "Screenshots" have been provided above.
• 🤓 我确保没有引入新依赖库，或者引入了新依赖库的同时将其添加到了 requirements.txt 和 pyproject.toml 文件相应位置。/ I have ensured that no new dependencies are introduced, OR if new dependencies are introduced, they have been added to the appropriate locations in requirements.txt and pyproject.toml.
• 😮 我的更改没有引入恶意代码。/ My changes do not introduce malicious code.

Summary by Sourcery

将项目版本提升到 4.16.0，并为本次发布添加相应的更新日志条目。

新功能：

• 记录在 4.16.0 版本中新增的消息、适配器以及临时文件管理功能。

错误修复：

• 记录在 4.16.0 版本中包含的消息、备份、日志和运行时清理行为方面的错误修复。

增强改进：

• 记录在 4.16.0 版本中提供的稳定性、日志记录、配置用户体验改进以及通用优化。

文档：

• 为 4.16.0 版本添加一份详细的双语更新日志文件。

Original summary in English

Summary by Sourcery

Bump project version to 4.16.0 and add the corresponding changelog entry for this release.

New Features:

• Document newly added messaging, adapter, and temporary file management capabilities introduced in version 4.16.0.

Bug Fixes:

• Document bug fixes for messaging, backup, logging, and runtime cleanup behavior included in version 4.16.0.

Enhancements:

• Document stability, logging, configuration UX improvements, and general optimizations delivered in version 4.16.0.

Documentation:

• Add a detailed bilingual changelog file for the 4.16.0 release.

[dosubot]

Related Documentation

Checked 1 published document(s) in 1 knowledge base(s). No updates required.

^{How did I do? Any feedback?}  

[sourcery-ai]

Hey - 我在这里给出一些整体性的反馈：

• 代码库中有多处硬编码的版本字符串（astrbot/cli/__init__.py、astrbot/core/config/default.py、pyproject.toml、desktop/package.json）；建议将版本信息集中到一个单一的“权威来源”中，然后由此派生其他地方的版本，以避免未来出现不一致问题。

给 AI Agents 的提示

Please address the comments from this code review:

## Overall Comments
- There are multiple hard-coded version strings across the codebase (`astrbot/cli/__init__.py`, `astrbot/core/config/default.py`, `pyproject.toml`, `desktop/package.json`); consider centralizing the version in a single source of truth and deriving others from it to avoid future mismatches.

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Original comment in English

Hey - I've left some high level feedback:

• There are multiple hard-coded version strings across the codebase (astrbot/cli/__init__.py, astrbot/core/config/default.py, pyproject.toml, desktop/package.json); consider centralizing the version in a single source of truth and deriving others from it to avoid future mismatches.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- There are multiple hard-coded version strings across the codebase (`astrbot/cli/__init__.py`, `astrbot/core/config/default.py`, `pyproject.toml`, `desktop/package.json`); consider centralizing the version in a single source of truth and deriving others from it to avoid future mismatches.

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