Complete rename of the card progression system from "Evolution" to
"Refractor" across all code, routes, models, services, seeds, and tests.
- Route prefix: /api/v2/evolution → /api/v2/refractor
- Model classes: EvolutionTrack → RefractorTrack, etc.
- 12 files renamed, 8 files content-edited
- New migration to rename DB tables
- 117 tests pass, no logic changes
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
