- drop the separate validate job (the zip is validated after packaging); same in release
- shared scripts/ci/assert-built-assets.sh (BusyBox-safe), now also used by release
- actions/cache for npm, shopware-cli and composer
- phpunit: shopware-cli image instead of a 4.5 min apt install; MariaDB 10.11
(11.4 broke Shopware's migrations: Duplicate column 'sorter_key')
- protect-main.sh: drop the removed validate context
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>