feat: add mTLS support for secure client-server communication (#3172) - #4571

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: BirthdayResearch/oss-governance-bot@3abd2d1fd2376ba9990fbc795e7a4c54254e9c61. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/