Symphony Read list of real time messages / events stream ("datafeed").

_Available on Agent 2.57.0 and above._ The datafeed provides messages and events from all conversations that the user is in. The types of events surfaced in the datafeed can be found in the [Real Time Events](./docs/real-time-events.md) list. Returns the list of the datafeeds for the user. Any datafeed ID of the list can then be used as input to the Read Messages/Events Stream v4 endpoint.