With regards to observation 4, when constructing the XDM for HTTP API
(stream) ingestion, there are two fields that seem to be optional and
don't serve any purpose:1. There is a "flowId" field that can be
included, ref, but that same field isn't specified in the API request
body documentation, here.2. There is a field in the request body schema
called SOURCE_NAME which is optional, but it seems this value can be set
to anything without impacting the ability to ingest the data. For
observation 3,...