test: Add a unit test for the usage of restrict_to and restriction_idx_key in select_in_dataset of GoldSelector - #322

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-python@v5, astral-sh/setup-uv@22695119d769bdb6f7032ad67b9bca0ef8c4a174. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/