We would like to enable a lower polling interval, but wanted to see the general response before doing that. In fact, we would like to enable: 1. A lambda func

We would like to enable a lower polling interval, but wanted to see the general response before doing that. In fact, we would like to enable: 1. A lambda function support to transform APIs (diffing to only append new data, adding meta data, removing unnecessary fields) before they get streamed. 2. Polling frequencies of up to 1s. 3. Custom domains for the resulting streaming endpoints.