chore(release): bump version to v2026.4.642 and update changelog}
- Bump package version from v2026.4.641 to v2026.4.642 in package.json
- Update p3x-redis-ui-material dependency from ^2026.4.412 to ^2026.4.416
- Update p3x-redis-ui-server dependency from ^2026.4.346 to ^2026.4.347
- Update yarn.lock with resolved versions for updated dependencies
- Add v2026.4.642 changelog entry in change-log.md
- Update build version references across README.md and all artifact docs
- Update build version in all yearly changelog files and contributors.md
- Add .changelog-prompt.tmp for changelog generation automation