Get unified product by ID

{
  "data": {
    "id": "prod_12345",
    "source_system": "shopify",
    "source_system_img_url": "https://cdn.example.com/shopify.png",
    "source_id": "sf_98765",
    "external_system_provider_id": "provider_001",
    "external_system_config_id": "config_abc",
    "external_system_data": {
      "custom_field": "value"
    },
    "supporting_data_definition_id": "support_001",
    "name": "Premium Rice",
    "description": "High quality rice from Sumatra.",
    "type": "food",
    "price": "12000.00",
    "is_primary": true,
    "local_was_deleted": false,
    "local_was_updated": true,
    "source_data_created_at": "2024-01-01T12:00:00Z",
    "is_active": true
  }
}