Feat: add support for docvalue_fields and stored_fields in TopHitsAggregation

[paulMConstant]

Hello,

It is currently impossible to my understanding to add "docvalue_fields" to a top hits aggregation. Here's a proposition using the storedFields field.

Thanks

[Philippus]

Stored fields are not the same thing as doc value fields, see https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-metrics-top-hits-aggregation.html. The existing storedFields field is not used in the builder, so that could be added. If you want to add docValueFields a field would have to be added to the TopHitsAggregation case class and an accompanying docvalueFields method similar to what is done in the InnerHit case class.

[paulMConstant]

Thank you for the quick review. I fixed the storedFields addition and added docValueFields as done in InnerHit.

[Philippus]

Thank you!

[paulMConstant]

Thank you for the quick merge !

[paulMConstant]

Do you think you could make a release soon ?

[Philippus]

I'd like to include the update to Elasticsearch 8.15.3, which looks to be imminent.