cuda: COLI_CUDA_RESID=1 — expert-group results stay on device (#431 PR-C0) - #434

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/