为智能体创建咏唱引擎会话

POST /v1/agents/sessions

curl -X POST https://agent.ariacompute.cn/v1/agents/sessions \
  -H "Authorization: Bearer $ARIA_AGENT_KEY" \
  -H "Content-Type: application/json" \
  -d '{"agent_id": "agent_01a2b3c4d5e6f7890abc"}'

{
  "id": "sess_9f8e7d6c5b4a3210fedc",
  "object": "agent.session",
  "agent": {
    "id": "agent_01a2b3c4d5e6f7890abc",
    "name": "SupportBot",
    "model": "gpt-4o-mini",
    "reasoning": {},
    "multi_agent": { "enabled": false },
    "service_tier": "auto"
  },
  "status": "idle",
  "created_at": 1740000000000
}