data: {"status":"IN_PROGRESS",
data: "text":"partial"}

data: {"status":"COMPLETED","final":true,"text":"final answer","display_model":"pplx_pro_upgraded","uuid":"req-basic","sources_list":[{"title":"Example","url":"https://example.com","snippet":"Example source","date":"2026-02-15T12:00:00.000Z"}]}

data: [DONE]