Crispy Zucchini Fries with Buttermilk Ranch Dipping Sauce

Name: Crispy Zucchini Fries with Buttermilk Ranch Dipping Sauce
Ingredients: 1/2 cup buttermilk; 1/2 cup mayonnaise; 2 tablespoons chopped fresh chives; 1 tablespoon chopped fresh dill; 1/2 teaspoon celery salt; 1/2 teaspoon garlic powder; 1/2 teaspoon onion powder; 1 cup flour; 2 large eggs; Kosher salt and freshly ground black pepper; 1 cup panko; 1/2 cup grated Parmesan; 1 1/4 teaspoons garlic powder; 3 medium (about 7-inch long) zucchini, cut into 1/2-by-3-inch sticks; Vegetable oil, for frying