Because the IDs of our callback and inbound SMS APIs were stored in
lists instead of directly on the serialised model they weren’t getting
cast to a string before trying to JSONify them. And JSON doesn’t know
what to do with a UUID object.
For some reason this was only affecting the endpoint for fetching
inbound SMS.
- had to update the serialization in the model so that the date time is appended with the UTC timezone
- test has been added to ensure that the schema will validate the response correctly
