- Add permission checks for music/book in MediaRequest.request()
- Add quota checks for music/book types
- Add externalServiceId and externalServiceTitle columns to Media entity
- Add foreignId/foreignTitle to MediaRequestBody interface
- Add requestMusicOrBook() method for simplified music/book requests
- Make TMDB lookup conditional (skip for music/book)
- Update request route filtering for music/book types
- Handle duplicate detection for foreign ID based media