- Convert flat prose entries in CHANGELOG.md and docs-site/changelog.md to bold headers + sub-bullets
- Scope artifact uploads in release/prerelease workflows to `latest*.yml` instead of `*.yml`
- Update release-notes and RELEASING docs to match
- Adjust workflow tests for new nested bullet format
CI runners don't have Claude Code installed, so the regen step in the
prerelease workflow died on 'claude CLI not found'. Mirror the stable
release model: generate prerelease-notes.md locally (claude -p), commit
it, and have CI just verify and reference the committed file.