Upload the master CSV to create or update monograph records by slug. Recognized columns: slug, name_latin, name_chinese, name_pinyin, name_malay, family, description, pdf_filename, sort_order, category, category_primary, energetics, flavor, meridians, traditional_edict, clinical_applications, preparation_dosage, cautions_contraindications, quality_markers, mechanism_phytochemistry, appended_prescriptions, plate_image_url.