From PDF to RAG-Ready: Evaluating Document Conversion Frameworks for Domain-Specific Question Answering. - José Guilherme Marques dos Santos; Ricardo Yang; Rui Humberto Pereira; Alexandre Sousa; Brígida Mónica Faria; Henrique Lopes Cardoso; José Duarte; José Luís Reis; Luís Paulo Reis; Pedro Pimenta; José Paulo Marques dos Santos (CoRR, 2026)