Replaces the long-disabled Kotlin changelogUpdateUnreleased/commitChanges
gradle steps with a new TS CLI (scripts-ts/src/promoteChangelog.ts) plus
two TC script steps:
* "Update change log" + "Commit preparation changes" — run on the
release branch before tagging, so the release tag points at the
promoted CHANGES.md commit.
* "Sync changelog to master" — runs after publish to mirror the
promotion on master. Master push is soft-fail so an upstream race
with the daily cron doesn't sink the marketplace release.
The promoter is a pure function (replace `## [To Be Released]` →
`## X.Y.Z, YYYY-MM-DD` for major/minor; no-op for patch releases per
the project convention that patches roll into the parent minor). Ten
vitest tests cover the behavior. CLI wrapper handles the TC entrypoint.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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