feat: harden UDS probe for Contact Search Authentication (9443 + auth flag) - #30

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683, astral-sh/setup-uv@6b9c6063abd6010835644d4c2e1bef4cf5cd0fca. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/