- add GitHub Actions CI workflow using Makefile targets exclusively
- run unit, integration and e2e tests via `make test`
- publish Docker image to GHCR on SemVer tags
- force-update `stable` git tag after successful release
- add integration test for seed CLI (CSV upsert behavior)
- extend Makefile with test-unit and test-integration targets
https://chatgpt.com/share/694ee54f-b814-800f-a714-e87563e538b7
