- Replace docker buildx build in run-test.sh with docker/build-push-action
- Add GitHub Actions cache support (type=gha) to all test workflows
- Update run-test.sh to use pre-built images when available
- Maintain backward compatibility for local testing
This should significantly improve CI build times by leveraging
GitHub Actions cache instead of less efficient inline caching.
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Co-Authored-By: Claude <noreply@anthropic.com>