用自动化清理孤儿进程，保持 Codex 流畅运行
通过定时清理测试残留进程与可丢弃缓存，降低资源占用，但需严格避免误杀和数据损失。
Prompt: Create an automation that runs every 20 minutes to keep Codex running smoothly. Safely stop stale or orphaned headless processes, clear disposable caches when safe, and audit for other low-risk performance improvements. Never interrupt active work, close Codex, or delete user data. Run it immediately.