[FIX] module_auto_update: skip creating/checking checksums for modules with 'imported = True'. Fixes update with 'studio_customization' installed. - #3691

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-python@v5. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/