Will add an example of a common scope and event at the end of the current "FHIRcast Authorization & SMART scopes" section within Session Discovery. Something like: For example, a requested scope of `fhircast/Patient-open.read` would authorize the subscribing application to receive a notification when the patient in context changed. Similarly, a scope of  `fhircast/Patient-open.write` authorizes the subscribed app to [request a context change] (#request-context-change).