The rc release step runs `npm version X.Y.Z-rc.N` before tests, which
rebakes the current version string into hook files and `gsd-core/VERSION`.
Without normalization, every golden parity hash differed post-bump and the
entire test suite failed with 16 golden failures — even though no files
actually changed in a semantically meaningful way.
Add `PKG_VERSION` normalization (`.split(PKG_VERSION).join('<VERSION>')`)
alongside the existing `<HOME>` root normalization so the goldens are
stable across version bumps. Regenerate all 16 fixtures with the new
normalization to establish the new baseline.
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>