chore(license): satisfy Apache-2.0 section 4(b) with mechanical per-file modification notices - #79

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: codespell-project/codespell-problem-matcher@b80729f885d32f78a716c2f107b4db1025001c42. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/