Apple Container provides faster container startup on macOS (~500ms vs 2-5s)
with native resource usage. This merges:
- container-runtime.ts: Apple Container API (system status/start, ls --format json)
- container-runtime.test.ts: Apple Container-specific tests
- container-runner.ts: .env shadow mount fix and privilege dropping
- container/Dockerfile: mount --bind for .env shadowing
- container/build.sh: default runtime set to container
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>