Bruno API test updates:
- Update test assertions: X-Bookmann-* → X-Bookhoard-*
- Update variable names and references in test scripts
- Update documentation and comments in API tests
This is part 4 of the project rename to Bookhoard.
- Add Kobo sync handler with markup, bookmark, analytics, and initialization endpoints
- Add Kobo integration tests and Bruno API test collection
- Move device approve/reject routes from public to protected routes
- Enhance test infrastructure with DATABASE_URL support and helper functions
- Fix device GetDevice handler nil pointer handling
- Clean up test reports and session files
john-okeefe