v0.3-security up

Commit 3f7da12 Here are the commit messages following the requested format:

1. feat(security): enhance user lock checks with UID validation and login.deny parsing
   增强安全功能：新增UID锁定检查并优化login.deny解析逻辑

2. feat(security): implement sensitive data wiping and standardized error messages
   安全增强：执行后自动清零敏感数据并统一错误消息格式

3. fix(environment): correct HOME assignment and enforce secure PATH defaults
   修复环境变量：修正HOME设置并强制使用安全PATH默认值

4. perf(groups): replace manual group handling with initgroups() system call
   性能优化：用initgroups()系统调用替代手动组管理逻辑

5. fix(executable): eliminate redundant PATH searches during resolution
   修复可执行文件查找：消除路径搜索中的冗余检查

6. docs(readme): add version changes section with improvement details
   文档更新：新增版本变更说明章节包含改进详情