WASHINGTON — A federal appeals court on Friday gave new life to a lawsuit by a group of Holocaust survivors seeking damages from Hungary for its role in the deaths of more than 500,000 Jews during World War II.The ruling by the U.S. Court of Appeals for the District of Columbia Circuit said a 1947 peace treaty between the Allied powers and Hungary does not give Hungarian officials immunity from the lawsuit. A federal judge had dismissed the case in 2014, saying it would conflict with the treaty’s terms.The lawsuit filed by …