feat(Foundations): one stage of the correction-and-copy hierarchy - #1683

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/

Not declared at the PR head: `E_k`, `ĝ_i`, `s_j`. Advisory only; see the job summary.