Add music/book request flow support

- 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

server/interfaces/api/requestInterfaces.ts

@@ -26,4 +26,7 @@ export type MediaRequestBody = {
   languageProfileId?: number;
   userId?: number;
   tags?: number[];
+  // Music/Book specific fields
+  foreignId?: string;
+  foreignTitle?: string;
 };