By THÉRÈSE MARGOLIS     In a solemn ceremony at his Lomas de Chapultepec residence on Tuesday, May 29, South Korean Ambassador to Mexico Kim Sang-il presented former Mexican Ambassador to Korea José Luis Bernal Rodríguez with his country’s Grand Gwanghwa Medallion, the highest level of diplomatic service honor that the East Asian nation can bestow. Bernal Rodríguez, who served as head