chat.group_name_updated fires when a group chat’s name changes.
Read the payload
Thedata object is the ChatGroupNameUpdatedEvent schema from the API contract. The envelope around it is the same on every event and is described in the event catalog.
Handle the event
Replace the stored name forchat_id with new_value. changed_by_handle is null when Relay made the change rather than a participant, and new_value is null when the name was cleared.

