Computes the filter type based on SK narrowing. When skCondition narrows to
specific entities, only those entities' attributes are accepted in the filter.
When SK doesn't narrow (no skCondition, suffixed string, etc.), falls back to
the full TypedFilterParams.
Computes the filter type based on SK narrowing. When
skConditionnarrows to specific entities, only those entities' attributes are accepted in the filter. When SK doesn't narrow (no skCondition, suffixed string, etc.), falls back to the full TypedFilterParams.