feat: round-trip QTI AssessmentItem raw_data through save and sync - #6028

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: fkirc/skip-duplicate-actions@master. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/