actl-uia 0.1.2

Windows UIA backend: the ONLY crate allowed to touch COM/unsafe
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actl-uia —— Windows UIA 后端:capture(窗口定位 + DFS 遍历)。

全仓库唯一接触 COM 的 crate(AGENTS.md §5.5)。 已知限制(spike #4,docs/spike-findings.md):walker 在"无子/无兄弟"时返回 Err, 与真错误不可区分——当前以 .ok() 视为尽头;HRESULT 分类列入 M1 遗留。 性能注记(spike #3):本版逐属性跨进程读取,release 下金任务实测,超 500ms 再上 cache request。