Tiffani Faison was the runner-up on the first season of Bravo’s “Top Chef” in 2006. Jason Santos and his blue hair gained fame on Fox’s “Hell’s Kitchen” in 2010. The following year, Jamie Bissonnette appeared on Food Network’s “Chopped.” These are just three of the approximately two dozen local chefs who have appeared on competitive cooking shows. Some have done well on-screen. Some not so much. We watch them, and then we move on to the next season. But what, for them, has been the lasting impact of TV fame on careers, restaurants, and revenues?