curl --location --request PATCH '/orders/by-client-id/ORD-2026-001' \
--header 'Content-Type: application/json' \
--data '{
"state": "shipped"
}'{
"orderId": "550e8400-e29b-41d4-a716-446655440000",
"clientOrderId": "ORD-2026-001",
"state": "shipped"
}