Function headless_lms_models::library::copying::map_old_exr_ids_to_new_exr_ids_for_exams

async fn map_old_exr_ids_to_new_exr_ids_for_exams(
    tx: &mut PgConnection,
    namespace_id: Uuid,
    parent_exam_id: Uuid
) -> ModelResult<HashMap<String, String>>