fix: Object update with a dot notation key below a pointer field can terminate the server process (GHSA-wc3c-6843-q7mv) - #10802

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