chore: Update version to 1.5.9

[wangrong1069]

As title.

Log: update version to 1.5.9

Summary by Sourcery

Chores:

• Update Debian changelog entry to reflect version 1.5.9 release.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR bumps the project version to 1.5.9 in the Debian packaging metadata by updating the debian/changelog entry.

File-Level Changes

Change	Details	Files
Update Debian packaging metadata to reflect new release version 1.5.9.	Increment the recorded package version to 1.5.9 in the changelog entry. Adjust the topmost changelog stanza (or add a new one) to represent the 1.5.9 release information as per Debian standards.	debian/changelog

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[github-actions]

TAG Bot

TAG: 1.5.9
EXISTED: no
DISTRIBUTION: unstable

[sourcery-ai]

Hey there - I've reviewed your changes and they look great!

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[deepin-ci-robot]

deepin pr auto review

这是一个 Debian 软件包的变更日志（changelog）diff。让我来分析一下这个变更：

1. 版本更新：

• 从 1.5.8 升级到 1.5.9
• 这是一个小版本更新，符合语义化版本控制规范

2. 变更内容：

• 类型：chore（维护性更新）
• 内容：更新编译器标志以增强安全性
• 这是一个很好的安全实践

3. 格式检查：

• 遵循了 Debian changelog 的标准格式
• 包含了必要的版本号、发行版和紧急程度信息
• 维护者信息和日期格式正确

改进建议：

1. 安全相关：

• 建议在 changelog 中具体说明增加了哪些安全相关的编译器标志，比如：
  • 是否启用了栈保护（-fstack-protector）
  • 是否启用了地址空间布局随机化（PIE）
  • 是否启用了格式化字符串漏洞保护（-Wformat-security）
  • 是否启用了其他安全相关的编译选项

2. 版本管理：

• 建议在更新说明中添加更详细的变更原因和影响
• 可以考虑添加相关的 bug 或安全漏洞编号（如果有的话）

3. 文档完整性：

• 建议添加相关的参考文档或安全指南链接
• 可以说明这些安全增强对用户或系统管理员的影响

示例改进后的 changelog 条目：

dde-device-formatter (1.5.9) unstable; urgency=medium

  * chore: Update compiler flags for security enhancements
    - Enable stack protection (-fstack-protector-strong)
    - Enable position-independent executables (PIE)
    - Add format string vulnerability protection
    - See: https://security.debian.org/ for more details

 -- wangrong <wangrong@uniontech.com>  Thu, 27 Nov 2025 10:44:36 +0800

这样的变更记录更加透明和有用，能够帮助用户和维护者更好地理解安全增强的具体内容。

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: lzwind, wangrong1069

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• debian/deepin/OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[wangrong1069]

/merge