列出咏唱引擎云会话

GET /v1/agents/sessions

curl "https://agent.example.com/v1/agents/sessions?agent_id=ag_0198a...&limit=20" \
  -H "Authorization: Bearer $ARIA_AGENT_KEY"

{
  "object": "list",
  "data": [
    {
      "id": "sess_0198c...",
      "object": "agent.session",
      "agent_id": "ag_0198a...",
      "status": "active",
      "created_at": 1735000000
    }
  ]
}