feat(pm): provenance-aware exception for the docs-audit --write artifact in the governed-fence predicate (#11078)

The --test predicate lifts .claude/workflows/docs-accuracy-audit.js from the
governed hit set only when the tree's copy byte-equals the generator output
recomputed on that same tree (replaceBlock(baseFile, docs derived from the
tree under test)) — never a stored baseline, no shape heuristics, fail closed
on every unverifiable input; the mixed-diff rule and every other surface
judgment are unchanged, and the post-merge sweep still lists every entry.

Maintainer rulings on #9866: 「10277 同意 C」 (2026-08-20), re-confirmed
「A:按方案 2(最新裁定)」 (2026-08-22).


Claude-Session: https://claude.ai/code/session_01MsbKEG4LtERSLaDrbehM3e

Co-authored-by: Claude <noreply@anthropic.com>

Author: os-zhuang