WASHINGTON (Reuters) - The U.S. economy unexpectedly added jobs in May after suffering record losses in the prior month, offering the clearest signal yet that the downturn triggered by the COVID-19 pandemic was probably over, though the road to recovery could be long.The Labor Department's closely watched employment report on Friday also showed the jobless rate falling to 13.3% last month from 14.7% in April, a post World War Two high. It came on the heels of surveys showing consumer confidence,..