docs: CHANGELOG notes the docsync fixture hunk taken from #3472

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

CHANGELOG.md

@@ -13,6 +13,7 @@
 - **PR paid planner** (`scripts/lib/paid-select.ts`): a generated `<skill>/sections/preamble.md` takes its skill's `SKILL.md.tmpl` identity, as that skill's SKILL.md already does, so a skill whose only paid coverage is periodic defers it instead of failing `screen-summary` with "requires full validation".
 
 ### Tests
+- `test/helpers/docsync-fixture.ts`: `fixtureDocs` copies the generated `sections/preamble.md` into the document-release and ship fixtures when the skill has one, because the hoisted SKILL.md names it as a required asset and a spawned docs audit blocks without it (hunk taken from #3472).
 - `test/helpers/skill-startup.ts` (new): `readSkillStartup` (SKILL.md with the shared file spliced in at its pointer, the reading order a skill sees) and `readSkillEffective` (each preamble section once, with this skill's variant applied). Tests that assert preamble rules are in context, E2E fixture extractors, workflow-judge bundles and install checks read these instead of SKILL.md alone; judge bundles keep their pre-hoist content.
 - `test/helpers/carve-guards.ts`: parity caps for ship, review, autoplan, spec, land-and-deploy, design-consultation, plan-devex-review, plan-ceo-review, office-hours and plan-eng-review raised to their measured unions (owner-approved, Garry 2026-10-25: "do it"), each with its reason. The union now includes the shared file; plan-ceo-review's cap (1.1006) also covers the 106-byte COMPLETENESS IS COVERAGE bullet from the completeness rewording below. office-hours and plan-eng-review count their own copies of shared sections twice until a follow-up dedupes them.
 - `test/fixtures/skill-md-size-allowlist.json`: 63 pins lowered and 26 deleted (now within the 100,000-character limit). None raised. The deferral note (owner Garry, revisit 2026-11-15) is retired here and in `test/skill-md-size-guard.test.ts`.