Replaces the committed golden-install-parity hash manifests and per-file
size baselines with a computed conservation law: every emitted path whose
hash moves must be attributable, via a declarative provenance table, to a
path the PR actually changed.
Supersedes ADR-2264 Decision §2-§4 and its Amendment; ADR-2264 Phase 1
(the single-source buildParityManifest and exclusion constants) is
retained and depended upon. Satisfies ADR-2264 AC1 rather than rewording
it away, per that ADR's own 2026-07-17 audit.
Docs-only. Both sides of the supersession edited together; ADR index
regenerated with gen-adr-index.cjs --write.
Closes#2720
Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
