ADEN-20 GPT SRA

See just 52688d44ce5d99ecdd96d3a6c73f92ae9f9dbd04 for the SRA version limited to just leaderboard and medrec and legacy calls for the rest.

See the whole pull request for the second version (based on the refresh hack).

This distinction allows us to easier to back to the "legacy fallback" version if we need to.