Pasquale Fuentes arrives at Shelsky’s Brooklyn Bagels around 4 p.m. and gets to work making dough, cutting it into slabs, and rolling it into ropes. On most days, he heads home around nine, but some nights he’ll spend another few hours rolling bagels in another shop. “There aren’t a lot of bagel rollers with experience,” says Fuentes of the many calls he receives from bagel-shop owners. If it weren’t for folks like him, New Yorkers would have to start their mornings with soft, machine-made bagels rather than the taut, chewy,…