200 OK — session open
> POST /ai/v1/session {"source": "bobw"}
< 200 OK req_01kqmsbb 68ms POST /ai/v1/search {} Idempotency-Key: 7GB8Ao-9QULb Send ▶> POST /ai/v1/session {"source": "bobw"}
< 200 OK req_01kqmsbb 68ms POST /ai/v1/search {} Idempotency-Key: 7GB8Ao-9QULb Send ▶