GET /v1/models：列出 Router 入口与 provider 模型

curl -H 'Authorization: Bearer $ARIA_ROUTER_KEY' \
  http://<router-host>:8080/v1/models

{
  "object": "list",
  "data": [
    {
      "id": "ariacompute/semantic-auto",
      "object": "model",
      "owned_by": "aria-router"
    },
    {
      "id": "gpt-4o",
      "object": "model",
      "owned_by": "provider"
    }
  ]
}