release: v1.0.3

[wuji-automation]

Release v1.0.3

此 PR 由集中式 Release 自动化流程创建。

变更内容

• 更新 CHANGELOG.md，将 Unreleased 替换为 v1.0.3

后续步骤

1. ✅ 审核 CHANGELOG 内容
2. ✅ 在发布日期合并此 PR
3. 🤖 自动触发: 打 tag、创建 release、发送飞书通知

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