Harden maven-workflow-run.yml (pin actions, validate commit_sha, scope token+secrets) — APS security-ai-review - #22

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9, github/codeql-action/upload-sarif@6c089f53dd51dc3fc7e599c3cb5356453a52ca9e. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/