Currently, we use ensureQueryShapeHash() to calculate the QSH, store the QSH in opDebug, and return the queryShapeHash to be used for PQS. If there is already a QSH on opDebug, we return that hash. For find/agg this is enough since only one query is run at a time. However, for batched updates, there will be a QSH per update, so ensureQueryShapeHash() should be updated so it will return the QSH for each update in a batch instead of only returning the first one.