Roast Chicken with Artichoke-Lemon Pan Sauce

Serves 4 1 whole chicken (about 3 ½ pounds) 1 ½ tablespoons kosher salt 1 ½ tablespoons olive oil 2 teaspoons sugar Freshly ground black pepper 1 box (9 ounces) frozen artichoke hearts, thawed 3 large garlic cloves, minced 1 teaspoon dried oregano 1 cup chicken broth ¼ cup each: dry vermouth and fresh lemon...