Follow-up work to SERVER-96792 - and related to SERVER-93521 - I remembered that there's some logic related to tracking usage of textScore metadata when we split the pipeline. I think we need to (a) make sure we didn't screw this up if you use $meta: "score" instead of $meta: "textScore" by adding some tests with references to "score" in some piece of the pipeline we know will execute after a split point and (b) see if this code might have hints about how we could implement SERVER-93521. It seems like the text search scenario would give a good example of how to do this. Relatedly, we should probably (c) add tests for the similar cases of split pipelines with $search and $vectorSearch also.