Intersects resolved entity names with SK-derived entity names.
Since skCondition is a DynamoDB key condition that physically limits which
items are scanned, it always constrains the result — it's not just a filter.
If SK narrows → intersect Names with SK entities. Empty intersection → never[].
If SK does not narrow → use Names alone via NarrowByNames.
Intersects resolved entity names with SK-derived entity names. Since
skConditionis a DynamoDB key condition that physically limits which items are scanned, it always constrains the result — it's not just a filter.Nameswith SK entities. Empty intersection →never[].Namesalone via NarrowByNames.