Update: She's waking up! I moved her onto a heat mat, placed the pot above a water reservoir, and covered it all with a plastic bag. This morning I saw the smallest little green nub, a full FOUR MONTHS after other OB posters began describing their plants coming out of dormancy. So, other catasetum newbies, take heart. Your timeframe may be very different than growers in, say, the Southern US. I'm still learning so much!