NEW YORK — Before pulling back from the brink of a trial, Fox News and Dominion Voting systems faced a stern deadline — not from an impatient judge or jury, but from a man on a Danube River cruise with his wife half a world away.A mediator hired late Sunday pushed the two sides toward a $787 million settlement that brought a stunning end to the most-watched media libel case in decades, one that sought to put a price on lies told about the 2020 presidential election on conservative America’s most popular …