2026-07-13 (itd-85 M3): docs-currency emits every finding at warn, downgrading

2026-07-13 (itd-85 M3): docs-currency emits every finding at warn, downgrading docs-lint blockers, because audit is an advisory conformance surface and the authoritative docs gate is abcd docs lint (still exits 2 on a blocker). Re-raising a docs blocker as an audit error would double-gate the same check.