On a given day, Harper Vickery might be photographing desserts. Or analyzing the structure of food menus. Or planning a social media campaign. She might be on Columbus Avenue at Caffé Strega in ISEC, or in Boston’s North End at Strega Prime. As the first co-op student with Strega—the Boston-based restaurant and café line known for its celebrity clientele—she wears a lot of hats.