Update project documentation and development scripts. - Update README test counts (953/957 passing, 8 skipped) - Simplify dev script: remove test DB seeding, add name history creation, clean up stale test databases on startup, remove -p 1 test flag - Update obsidian documentation for new features: - Name history system docs - Referral discount system docs - Database migration docs (CHAR(12) short IDs) Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>