- Fix runtime line (Node 22 slim, not Node 18 Alpine)
- Add Hosting line (Gitea, use tea not gh)
- Reflect new CI/CD flow (Gitea Actions, manual version bump, PACKAGES_TOKEN)
- Add PDGA Domain Notes section (rating cycle, predicted-rating algorithm,
rate limits) so future sessions don't have to re-derive domain logic
- Note absence of test framework explicitly