Batch sending

curl --request POST \
  --url https://api.dugble.com/sms/batch \
  --header "Authorization: Bearer $DUGBLE_API_KEY" \
  --header "Content-Type: application/json" \
  --header "Idempotency-Key: reminder-batch-2026-08-10" \
  --data '[
    {
      "to": "+233201234567",
      "from": "Dugble",
      "body": "Hello Ada!",
      "metadata": {
        "customer_id": "cust_42"
      }
    },
    {
      "to": "+233241234567",
      "from": "Dugble",
      "body": "Hello Grace!",
      "scheduled_at": "in 10 min",
      "metadata": {
        "customer_id": "cust_84"
      }
    }
  ]'

{
  "messages": [
    {
      "to": "+233201234567",
      "from": "Dugble",
      "body": "Hello Ada!"
    }
  ]
}

{
  "success": true,
  "data": [
    {
      "object": "sms",
      "id": "ae2014de-c168-4c61-8267-70d2662a1ce1"
    },
    {
      "object": "sms",
      "id": "faccb7a5-8a28-4e9a-ac64-8da1cc3bc1cb"
    }
  ]
}