- Pin jar output to analytics.jar (no version suffix) so Dockerfile COPY is stable
- Add Dockerfile based on apache/spark:3.5.4-scala2.13-java17-ubuntu
- Add versions.env (0.1.0) matching GitOps overlay image tag
- Add analytics-image.yml CI workflow following native-image.yml conventions
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>