In the past, Josué Alvardo, 19, would have been an unlikely detainee: He had entered the country legally on parole and with work authorization. He had a pending asylum claim and was taking English classes at Onondaga Community College, hoping to soon return to the studies he had left behind when he fled Ecuador. Instead, Josué had been in detention for about two weeks when a judge denied a legal action filed by his mother seeking his release. U.…