curl --request POST \
  --url https://core.ravenna.ai/api/ai-brief-schedules \
  --header 'Content-Type: application/json' \
  --header 'x-ravenna-api-token: <api-key>' \
  --data '{
  "dashboardId": "<string>",
  "cadence": "daily",
  "slackChannelIds": [
    "<string>"
  ],
  "time": "<string>",
  "day": 15,
  "userId": "<string>"
}'

{
  "id": "<string>",
  "dashboardId": "<string>",
  "workspaceId": "<string>",
  "organizationId": "<string>",
  "userId": "<string>",
  "cadence": "daily",
  "slackChannelIds": [
    "<string>"
  ],
  "time": "<string>",
  "day": 123,
  "scheduleId": "<string>",
  "isActive": true,
  "lastRunAt": "<string>",
  "nextScheduledAt": "<string>",
  "createdAt": "<string>",
  "updatedAt": "<string>"
}