Step 05 — Hardening

- CorrelationId VO pour le tracing inter-BC
- IdempotencyStore (interface + InMemory) pour garde d'idempotence
- correlationId ajouté aux contrats Published Language (retro-compatible par défaut)
- Consumers Invoicing et LegacyFulfillment idempotents avec logging
- MessengerSalesEventPublisher propage les correlationIds
- Tests unitaires idempotence + tests d'intégration consommateurs idempotents

tests/Contract/Sales/v1/ConformistCompatibilityTest.php

@@ -10,6 +10,7 @@ use MiniShop\Invoicing\Application\Command\IssueInvoiceForExternalOrderHandler;
 use MiniShop\Invoicing\Infrastructure\Persistence\InMemoryInvoiceRepository;
 use MiniShop\Invoicing\Infrastructure\SequentialInvoiceNumberGenerator;
 use MiniShop\Invoicing\Interfaces\Messaging\WhenOrderConfirmed;
+use MiniShop\Shared\Technical\InMemoryIdempotencyStore;
 use MiniShop\Shared\Technical\SystemClock;
 use PHPUnit\Framework\TestCase;
 
@@ -28,7 +29,7 @@ final class ConformistCompatibilityTest extends TestCase
             new SequentialInvoiceNumberGenerator(),
             new SystemClock(),
         );
-        $consumer = new WhenOrderConfirmed($handler);
+        $consumer = new WhenOrderConfirmed($handler, new InMemoryIdempotencyStore());
 
         $message = new OrderConfirmed(
             orderId: 'order-conformist-001',