LEA GUEDJI AMERICAN couple Oscar Galeas and Stephany Novoa had to cut short their honeymoon in Europe because of COVID-19. This month they were back to try again, part of a trickle of tourists visiting Paris as the pandemic eases. "We're finishing our honeymoon," said Novoa, on board a Paris tourist boat making its way last Friday along the river Seine past Notre Dame cathedral and the Eiffel Tower. The flow of tourists to Paris, many of them from Asia and the United States, dried up almost completely last year, when the COVID-19 pandemic struck and governments around the world…