chore: bump version to v2026.4.329 and update changelog}
- Bump package.json version from 2026.4.328 to 2026.4.329
- Update build version references from v2026.4.327 to v2026.4.328 across documentation files (README.md, INSTALL.md, change-break.md, todo.md, artifacts/php-7.2-ubuntu.md, artifacts/screenshots.md)
- Add v2026.4.328 changelog entry in change-log.md with version bump note
- Update footer build version in change-log.md