Cognite Data Fusion: Include aggregates in the output from Synthetic TimeSeries

As a developer, I want to be able to retrieve min/max from synthetic time series and not just the average values, from the javascript sdk

The custom calculation feature in tnt is complicated by not being able to retrieve min max values from synthetic time series. We therefore have to load hourly granularity to show a representative time serie. We would like synthetic time series to return the min max values as well.

Should take into account that each time serie might not have max/min values at the same time within the granularity.

This has the highest priority from the Statnett App development team.