PARIS — French Prime Minister Sébastien Lecornu announced his government at 7.40 p.m. on Sunday. By 9.45 a.m. the next morning, it was all over. Lecornu submitted his government’s resignation to President Emmanuel Macron on Monday morning, just 14 hours after key members of his cabinet were announced. He had served less than 27 days on the job — becoming France’s shortest-serving prime minister in modern history. His downfall is a seismic shock that has pushed the country even further into a