When Carla Hall was 30, she had a spiritual reading done. The woman told her that her 40s were going to be amazing. Hall was unsure, but the woman was insistent — there was something about that decade as a whole. And there was. “Top Chef” helped launch Hall — a Howard University graduate who worked as an accountant and a model before starting a lunch delivery service, going back to culinary school, becoming a chef and then starting a catering b…