Get timeline

curl -X GET "https://app.dacard.ai/api/intelligence/timeline?productId=prod_abc&since=2026-04-01" \
  -H "Authorization: Bearer $DACARD_API_KEY"

{
  "events": [
    {
      "id": "evt_...",
      "ts": "2026-05-04T12:00:00Z",
      "type": "score.completed",
      "productId": "prod_abc",
      "summary": "Score landed at 78"
    }
  ],
  "nextCursor": null
}