US developers are racing to cash in on the nation’s natural-gas export boom while they still can.The massive US buildout of terminals that process and ship liquefied natural gas, or LNG, has transformed the nation into the world’s top exporter of the fuel. But plants still in development are facing a tight deadline: By 2027, global LNG supply will exceed demand, BloombergNEF estimates. By 2030, US rival Qatar will have finished its own years-long LNG buildout, further damping appetite for new terminals. And ...