We have a series of metrics on OpDebug that store mongot-related information (mongotCursorId, msWaitingForMongot, mongotBatchNum, mongotCountVal, mongotSlowQueryLog). If the pipeline has multiple mongot stages (like [$search, $unionWith: [$vectorSearch]]), both mongot stages may overwrite or combine their metrics. We should investigate the current behavior, document it better, and consider if we want to change that behavior.