One of the country’s longest-standing fine-dining restaurants is about to undergo a major shakeup. This $4.7 Million Seattle Houseboat Lets You Watch the Sunset Over Lake Union From a Hot Tub The brothers behind Seattle’s Canlis are parting ways, and the restaurant’s executive chef and sous-chef are leaving, The New York Times reported on Wednesday. Mark Canlis will remain to run the restaurant that his grandfather opened in 1950, while Brian Canlis will move with his family to Nashville. Meanwhile, chef Aisha Ibrahim and her wife, sous-chef Samantha Beaird, are departing with plans of opening their own spot in…