justsisyphus d419bc302c refactor: rename atlas agent to Atlas for naming consistency
- Rename agent name from 'atlas' to 'Atlas' (PascalCase like Sisyphus, Metis, Momus)
- Add migration for lowercase 'atlas' -> 'Atlas' for backward compatibility
- Keep hook name as 'atlas' (lowercase) to match other hook naming conventions
- Update all references in types, schema, hooks, commands, and tests
2026-01-21 11:19:00 +09:00
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