chore: bump version to v2026.4.328 and update changelog}
- Bump package version from 2026.4.327 to 2026.4.328 in package.json
- Add v2026.4.327 changelog entry with fixes for git -S changelog
anchor commit lookup and duplicate entry removal
- Update build version references from v2026.4.326 to v2026.4.327
across documentation files (README, INSTALL, change-break, change-log,
todo, artifacts/php-7.2-ubuntu, artifacts/screenshots)