Achievement claim lifecycle

Achievement claims should move through defined states.

1. Submitted — a new claim or correction is recorded.
2. Triaged — scope, evidence, and affected documentation are identified.
3. Under review — sources and reproducibility are checked.
4. Accepted — evidence meets the publication standard.
5. Disputed — reliable sources conflict or reproduction fails.
6. Superseded — newer platform behaviour replaces the earlier conclusion.
7. Archived — the claim remains historically useful but is no longer current.

State changes should include a date and concise rationale.