Hello, Since version 3.6 mongo introduced collection change streams <https://docs.mongodb.com/v3.6/changeStreams/> which allow to observe real-time changes of a collection. This looks very accommodating to calcite streams <https://calcite.apache.org/docs/stream.html> which provides more complex windowing and grouping operations. Do you think it makes sense to support streams in Mongo Adapter ? Would you be interested in such feature ? Thanks in advance, Andrei.