Change Details

[] Updating the API ticket (T246766) [x] Link to the ADR in the [Readme](https://doc.wikimedia.org/Wikibase/master/php/md_docs_components_repo-federated-properties.html) [x] Prefetching and batching

[x] Updating the API ticket (T246766) [x] Link to the ADR in the [Readme](https://doc.wikimedia.org/Wikibase/master/php/md_docs_components_repo-federated-properties.html) [x] Prefetching and batching

[x] Updating the API ticket (T246766) [x] Link to the ADR in the [Readme](https://doc.wikimedia.org/Wikibase/master/php/md_docs_components_repo-federated-properties.html) [x] Prefetching and batching