200 OK — session open
> POST /ai/v1/session {"source": "strawberry"}
< 200 OK req_001w9rhy 35ms POST /ai/v1/search {} Idempotency-Key: 1oDnyCofwoh_ Send ▶> POST /ai/v1/session {"source": "strawberry"}
< 200 OK req_001w9rhy 35ms POST /ai/v1/search {} Idempotency-Key: 1oDnyCofwoh_ Send ▶