Instead, you register persistent, stateful enrichment "streaming jobs" (i.e. incrementally-materialized views) into the data warehouse; and then, when data comes into a table upstream of these views, it gets streamed into and through the related job to incrementally populate the matview.

This is correct. There is an example in the docs of dumping json records into a source and then using materialized views to normalize and query them - https://materialize.io/docs/demos/microservice/