Brek AI Partner Core Chat

Execute Brek through /api/partner/v1/core-chat.

Use this execution order:

1. Create one session per end user (POST /sessions) with a stable actor.actorId.
2. Reuse that session for all follow-up messages (POST /events).
3. Read the latest state when needed (GET /sessions/{sessionId}).

Do not share one session across different users.

Required runtime inputs