Step 00 — Squelette + intégration naïve

3 Bounded Contexts (Sales, Invoicing, LegacyFulfillment) avec :
- Domaines complets (agrégats, VOs, événements, invariants)
- Couche application (commands, queries, ports)
- Infrastructure in-memory (repos, gateway fake)
- Controllers HTTP Symfony
- Couplage naïf synchrone entre BC via NaiveSalesEventPublisher
- 20 tests unitaires et d'intégration passants

src/LegacyFulfillment/Infrastructure/Gateway/FakeLegacyFulfillmentGateway.php

@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\LegacyFulfillment\Infrastructure\Gateway;
+
+use MiniShop\LegacyFulfillment\Application\Port\LegacyFulfillmentGateway;
+use MiniShop\LegacyFulfillment\Domain\Model\ShipmentRequest;
+
+final class FakeLegacyFulfillmentGateway implements LegacyFulfillmentGateway
+{
+    /** @var list<ShipmentRequest> */
+    private array $sentRequests = [];
+
+    public function sendShipmentRequest(ShipmentRequest $request): void
+    {
+        $this->sentRequests[] = $request;
+    }
+
+    /** @return list<ShipmentRequest> */
+    public function sentRequests(): array
+    {
+        return $this->sentRequests;
+    }
+}