Illustration: Sarah Grillo/AxiosRestaurants are placing big, experimental bets on robots that stir-fry, flip burgers, mix drinks, cook ramen, bake pizza, deliver meals to diners and whisk away the dirty dishes.But the droids may not be ready for prime time just yet.Why it matters: Worker shortages and inflation continue to bedevil the restaurant industry — even as it enjoys record sales.Robots, tech and AI are seen as potential saviors, boosting efficiency and revenue.Driving the news: At the Na...