- 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
- Remove manual device ID generation, use database-generated IDs
- Add comprehensive test helpers (setupTestServer, loginTestUser, getTestUserID)
- Add cleanup step for existing test users in integration tests
- Fix UUID parsing from database responses