Cross-dataset references now respect query perspective

Requests containing cross-dataset references (CDR) now respect the perspective of the query.

For example, if a document is requested with the 'drafts' perspective, its cross-dataset references will be resolved as if they were queried with the `drafts` perspective as well.

Previously, queries containing CDRs would always return the published version of the CDR documents, regardless of the originating query's perspective.

To continue using the previous behavior, use an API version prior to 2025-06-19. Updating to 2025-06-19 or later will cause requests containing CDRs to use the query's perspective.