/GET /suppressions/:id
curl -X GET "https://api.emailit.com/v1/suppressions/:id" \
  -H "Authorization: Bearer your_api_key"
{
  "id": "resource_123456789",
  "name": "Příklad názvu", 
  "status": "active",
  "created_at": "2023-01-01T12:00:00Z"
}