fix(server): bound GLiFormer decoded text by characters - #655

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02, jdx/mise-action@c37c93293d6b742fc901e1406b8f764f6fb19dac. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/