Operator-seeded channel ids this session may join.
The account's claimed chat handle; null for readers, who have none.
Access tier: signed-out visitors and signed-in accounts without an active subscription get reader sessions (read everything, post nothing).
Short-TTL chat-scoped token (aud ispo-chat). Never the cloud bearer.
wss:// endpoint of the realtime chat worker.
A minted Community chat session: exactly what the app needs to connect the realtime chat worker directly, and nothing else.