List credential provider configs

Example response

{
  "data": [
    {
      "config": {
        "client_id": "client_abc123",
        "client_secret": "***",
        "environment": "production",
        "kind": "pipedream",
        "project_id": "proj_abc123"
      },
      "created_at": "2026-06-29T12:00:00Z",
      "name": "pipedream",
      "updated_at": "2026-06-29T12:00:00Z"
    }
  ]
}