List contacts

{
  "data": [
    {
      "id": "123e4567-e89b-12d3-a456-426614174000",
      "wa_id": "15551234567",
      "profile_name": "John Doe",
      "display_name": "John (VIP)",
      "customer_id": "550e8400-e29b-41d4-a716-446655440000",
      "metadata": {
        "segment": "vip"
      },
      "created_at": "2025-03-26T15:05:00.000000Z",
      "updated_at": "2025-03-26T15:05:00.000000Z"
    },
    {
      "id": "223e4567-e89b-12d3-a456-426614174001",
      "wa_id": "15557654321",
      "profile_name": "Jane Smith",
      "display_name": null,
      "customer_id": null,
      "metadata": {
        "source": "sandbox"
      },
      "created_at": "2025-03-26T15:00:00.000000Z",
      "updated_at": "2025-03-26T15:00:00.000000Z"
    }
  ],
  "meta": {
    "page": 1,
    "per_page": 20,
    "total_pages": 1,
    "total_count": 2
  }
}