Fried Chicken Banh Mi

Name: Fried Chicken Banh Mi
Ingredients: Neutral oil, for frying; 1/2 cup unseasoned rice vinegar; 1 tablespoon granulated sugar; 1 teaspoon kosher salt; 1 cup julienned carrots; 1 cup peeled and julienned daikon; 1/2 cup Japanese-style mayonnaise, such as Kewpie; 2 tablespoons sriracha; 1 tablespoon hoisin sauce; 2 large eggs; 1/4 cup cornstarch; 2 teaspoons kosher salt; 1 teaspoon five-spice powder; 3 cups panko breadcrumbs; 2 boneless, skinless chicken breasts, sliced lengthwise in half (into thin cutlets); 4 tablespoons unsalted butter, divided; 4 crusty hoagies or small baguettes; Dill pickle slices; 1 jalapeño, thinly sliced, optional; Cilantro leaves and tender stems