curl --request GET \
  --url https://api.polyrouter.io/functions/v1/series \
  --header 'X-API-Key: <api-key>'

{
  "series": [
    {
      "id": "<string>",
      "platform": "polymarket",
      "platform_id": "<string>",
      "title": "<string>",
      "series_slug": "<string>",
      "description": "<string>",
      "image_url": "<string>",
      "category": "<string>",
      "tags": [
        "<string>"
      ],
      "metadata": {},
      "events": [
        "<any>"
      ],
      "markets": [
        "<any>"
      ],
      "last_synced_at": "2023-11-07T05:31:56Z",
      "raw_data": {}
    }
  ],
  "pagination": {
    "total": 123,
    "limit": 123,
    "offset": 123,
    "has_more": true,
    "next_offset": 123
  },
  "meta": {
    "request_time": 123,
    "cache_hit": true,
    "data_freshness": "2023-11-07T05:31:56Z"
  }
}