curl --request GET \
  --url https://api.kapso.ai/platform/v1/whatsapp/broadcasts/{broadcast_id} \
  --header 'X-API-Key: <api-key>'

{
  "data": {
    "id": "5f6a7b8c-9d0e-1f2a-3b4c-5d6e7f8a9b0c",
    "name": "Weekend Sale 2025",
    "status": "sending",
    "started_at": "2025-07-15T10:00:00Z",
    "completed_at": null,
    "created_at": "2025-07-14T15:00:00Z",
    "updated_at": "2025-07-15T10:30:00Z",
    "whatsapp_config_id": "4a5b6c7d-8e9f-0a1b-2c3d-4e5f6a7b8c9d",
    "phone_number_id": "1234567890",
    "whatsapp_template": {
      "id": "7a8b9c0d-1e2f-3a4b-5c6d-7e8f9a0b1c2d",
      "name": "weekend_sale_2025",
      "language_code": "en_US",
      "category": "MARKETING",
      "status": "approved"
    },
    "total_recipients": 1000,
    "sent_count": 650,
    "failed_count": 50,
    "delivered_count": 600,
    "read_count": 320,
    "responded_count": 45,
    "pending_count": 300,
    "response_rate": 6.9
  }
}