When deserialization fails we fallback to providing the user with a
serde_json::RawValue, basically the json string. Ruma should handle all
events that conform to a matrix event shape correctly by either
converting them to their type or returning a custom event.
The MessageQueue holds MessageEventStub<AnyMessageEventContent> so when
a redaction event is encountered the redacted event's content can be
replaced. The Unsigned field redacted_because is also populated with the
redaction event itself with the addition of a room_id Stub -> full
event.
Damir Jelić
Devin Ragotzy
Denis Kasak