Tighten CI (lint + typecheck + unit + integration + image builds), full `docker compose up` stack, end-to-end smoke test across the whole pipeline. **Test:** the full stack runs from one `docker compose up`; CI matrix green including image builds.
Tighten CI (lint + typecheck + unit + integration + image builds), full
docker compose upstack, end-to-end smoke test across the whole pipeline.Test: the full stack runs from one
docker compose up; CI matrix green including image builds.