At the moment, far too many true crime documentaries function as little more than an episode of “Dateline.” They report information but lack analysis or even thoughtful ideas about how to use the medium of film to tell a story at once shocking and infuriating. Such is the case with “Our Father” on Netflix, about a fertility doctor who secretly used his own sample to artificially inseminate more than 90 patients. For years, Dr. Donald Cline was one of the better-known fertility specialists in his Indianapolis community. His patients were led to believe they were being inseminated either with sp…