I watch comedy, but I’ll be honest: I didn’t know much about Maria Bamford’s career before watching “Paralyzed by Hope: The Maria Bamford Story.” That’s one of the pleasures of a good documentary. Sometimes, you tune in to celebrate a familiar face; other times, you discover someone new and wonder how their work remained under your radar. Co-directors Judd Apatow and Neil Berkelai introduce the comedian through a mix of her career history and present-day access, following he