Norwell swept Columbia City to open up the boys’ swim season and to make the girls’ team 2-0 Tuesday night. The Knights hosted the Eagles and defeated them 115-60 in the boys’ meet and 111-57 in the girls. Individual winners: Boys • Braden Hoag, Colten Strunk, Kale Meredith and Gage Reinhard in thw 200-yard medley…