By Dee-ann Durbin It’s a chicken-and-egg problem: Restaurants are struggling with record-high U.S. egg prices, but their omelets, scrambles and huevos rancheros may be part of the problem. Breakfast is booming at U.S. eateries. First Watch, a restaurant chain that serves breakfast, brunch and lunch, nearly quadrupled its locations over the past decade to 570. […]