{"message":"Biblioteca Acessível PDF API is running","version":"1.0.0","docs":"/docs","frontend":"Frontend not built","endpoints":{"upload":"POST /pdf/upload","process":"GET /pdf/{pdf_id}","list":"GET /pdf/list","delete":"DELETE /pdf/{pdf_id}","info":"GET /pdf/{pdf_id}/info","book_exists":"GET /books/exists?sha256=..."}}