Flanked by more than 2,000 oarsmen rowing to a steady drumbeat, Thailand’s King Maha Vajiralongkorn travelled down Bangkok’s Chao Phraya river as part of a 52-barge flotilla on Thursday, marking the final event of his coronation.The flotilla comes seven months after the monarch was crowned in an elaborate three-day affair that involved sacred bathing rituals and a grand procession where he was carried on a palanquin around Bangkok’s historic old quarter to greet the public.Thousands of well…