The LLM Data Auditor: A Metric-oriented Survey on Quality and Trustworthiness in Evaluating Synthetic Data. - Kaituo Zhang; Mingzhi Hu; Hoang Anh Duy Le; Fariha Kabir Torsha; Zhimeng Jiang; Minh Khai Bui; Chia-Yuan Chang 002; Yu-Neng Chuang; Zhen Xiong; Ying Lin; Guanchu Wang; Na Zou 001 (CoRR, 2026)