Extend the CI build-job timeout caps for M2-PERF-01 (Linux 10→45, macOS arm64 15→20) - #94

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/