chore: bump version to v2026.4.314 and update changelog}
- Bump version from v2026.4.313 to v2026.4.314 in package.json
- Update build version references across README.md, artifacts, changelogs, and contributors.md
- Reduce pro license pricing from 1,200 HUF/month to 400 HUF/month
- Reduce enterprise license pricing from 3,600 HUF/month to 1,200 HUF/month
- Add changelog entry for v2026.4.314 with RedisJSON support, CodeMirror 6 editor, dark scrollbar styling, CSP directive fix, and updated pricing