Make sure forwarding also includes data from http batch posts

[oscgonfer]

Given our workflow for data ingestion and processing, we need to make sure that the forwarding payloads also include data as it comes from external postprocessing flows.

[timcowlishaw]

This should, as far as i can work out, already be the case! Once data is posted over http, it gets sent to a sidekiq job which calls the same storer logic as the mqtt listener. We should verify in practice next time we do a test /deploy session, but i'm pretty happy this should work as required