Adds a smoke job that boots postgres/redis/backend/frontend/traefik via
docker compose, polls the backend /health endpoint, verifies the
frontend responds, and tears down. Adds a tag-gated images job that
builds and pushes backend/frontend images to GHCR on v* tags.
Authored By: TDvorak <[email protected]>
Generated with [Devin](https://devin.ai)
Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
