YAOUNDÉ, Cameroon — The World Trade Organization’s ministerial meeting ended in the early hours of Monday morning without reaching a deal to extend a moratorium on e-commerce tariffs or on a broader reform work program for the beleagured global trade rules body. Director-General Ngozi Okonjo Iweala said ministers from the 166-nation global trade body had kept working as the four-day meeting in Cameroon ran into overtime on Sunday, but she finally called time overnight . “We have run out of time.