200 OK — session open
> POST /ai/v1/session {}
< 200 OK req_00ctap1z 50ms POST /ai/v1/search {} Idempotency-Key: MBexgtUBg1OR Send ▶> POST /ai/v1/session {}
< 200 OK req_00ctap1z 50ms POST /ai/v1/search {} Idempotency-Key: MBexgtUBg1OR Send ▶