Query cost aggregates

curl --request GET \
  --url https://forge.gloo.ai/api/v1/cost \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "bucketStart": 123,
      "totalInputTokens": 123,
      "totalOutputTokens": 123,
      "totalThinkingTokens": 123,
      "totalTokens": 123,
      "totalCost": 123,
      "eventCount": 123,
      "runCount": 123,
      "successCount": 123,
      "failureCount": 123,
      "avgCostPerEvent": 123
    }
  ],
  "meta": {
    "requestId": "<string>",
    "hasMore": true,
    "nextCursor": "<string>"
  }
}