GRAND FORKS — It was a more intimate affair than most at Riverside Christian School's commencement ceremony on Sunday night. Daniel Moonen and Isaac Sundby — the only two people on Earth with the distinction of being members of Riverside's Class of 2026 — were honored while surrounded by several dozen of their friends, family and teachers at the event, which was held at The Opal Event Center in Grand Forks. The graduates became best friends over…