feat(governance): holdout 隔离断言 + 泄漏诱饵巡检（W1-C4 #167，ADR-0056） - #176

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randypanding merged 3 commits into

mainfrom

Aug 21, 2026

Commits on Aug 21, 2026

feat(governance): holdout 隔离断言 §18 + 泄漏诱饵巡检 sweep/drill（W1-C4 #167，ADR-0056）
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merge: main into w1c4-holdout（解 expected-state 豁免双追加冲突）
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Merge remote-tracking branch 'proxy/main' into w1c4-holdout
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