Minimal failing cases for the traversal dedup (for #511) - #516

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: lukka/get-cmake@v4.2.3. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/