For an update-by-id run through the express executor, we actually create and seek two WT cursors on the record store, not one. That is, we find the _id in the index, then seek to the corresponding RecordId a first time here, and then a second time when calling collection_internal::updateDocumentWithDamages (same for updateDocument()).

It should be possible to avoid creating the second cursor here and re-using the existing one.

Note that even if we re-use the cursor, WT will internally re-seek the cursor, though we should look into changing that as well.