curl -X POST "https://app.talkover.ai/api/v1/calendars/sync" \
  -H "Authorization: Bearer talq_your_environment_token_here"

{
  "success": true,
  "data": {
    "syncing": ["calendar-uuid-1", "calendar-uuid-2"],
    "up_to_date": ["calendar-uuid-3"]
  }
}