Push down ORDER BY with array indexing

The following scenario should push down the ORDER BY to the index.

CREATE INDEX idx_age ON default(age, DISTINCT ARRAY name FOR name IN names END, names );

EXPLAIN SELECT META().id
FROM default
WHERE age IS NOT NULL AND ANY name IN names SATISFIES name LIKE 'test%' END
ORDER BY age
LIMIT 30 OFFSET 0;

This was raised by a user as a high priority:

https://forums.couchbase.com/t/couchbase-4-5-indexscancounter-missing-for-array-indexing/8139/5