Fixes the two Tests-workflow failures on the onboard PR.
lint-tests (lint-allow-test-rule-refs): the new
tests/onboard-command.test.cjs carried a `source-text-is-the-product`
allow-test-rule exemption with no tracking ref, tripping the novel-offender
gate. Add `(see #1990)` per ADR-456 so the exemption is traceable.
golden-install-parity: the /gsd:onboard feature adds
gsd-core/workflows/onboard.md and skills/gsd-onboard, and updates
templates/project.md, workflows/do.md, the help modes, and map-codebase.
Recapture the golden fixtures (UPDATE_GOLDEN=1) for all 16 runtimes so the
installed-output manifest matches the intended source changes.
Co-authored-by: Codesmith <codesmith-bot@users.noreply.github.com>
