Workers communicate with the /work endpoint via Websocket. They provide their
configuration and if a task is available, the server returns it. The worker then
performs the task and returns the result in a streaming fashion to the server,
also via websocket.
Clients first call /chat to make a new chat, then add to that via
/chat/<id>/message. The response is a SSE event source, which will send tokens
as they are available.