World leaders lined up at the United Nations on Tuesday to call on Israel to refrain from a full-scale war in Lebanon, with the organization’s chief warning the situation was on the “brink.” The UN General Assembly, the high point of the international diplomatic calendar, comes after Lebanese authorities said Israeli strikes had killed 569 people — 50 of them children. “Full-scale war is not in anyone’s interest. Even though the situation has escalated, a diplomatic solution is still possible,” US President Joe Biden said in his farewell address to the global body. “In fact, it remains the on…