Publishing of rows directly into Prana

[purplefox]

Currently, Prana ingests events solely from Kafka topics. This requires a Kafka broker to be setup to receive the events.

In some installations it would be nice if a client (perhaps just a standard Kafka client) could be pointed at Prana directly and events published directly to a Prana source. This would mean the user could send and consume events, create materialized views and execute SQL without having Kafka at all!