v0.2.0: the enterprise fanout

Seven packs (python-fastapi, typescript-node, react, containers-k8s, aws-cdk, aws-serverless, github-actions), 18 laws, and the multi pack core: per pack check execution, pinned workdirs, composed monorepo init with pack owned root CI, scoped waivers. One command produces a react plus fastapi app on Fargate with a dev to uat to prod promotion pipeline. Proven by an enterprise E2E battery and a blind agent building a cross stack feature under all five gates.