pdoom-data README overhaul: schema, provenance, contribution rules #23
Description
Tasks
- Document core datasets and how they're used (game vs website)
- Add schema notes (fields, required columns, formats)
- Add provenance rules: sources, citations, and review standards
- Add contributor workflow: how to propose events / corrections
Acceptance Criteria
- A donor can understand why this repo is a reusable public good in 3 minutes
Part of Grant Readiness Epic (pdoom1#479)