feat: 實作 POS API 整合功能，包含商品與銷售訂單同步及韌性機制

app/Modules/Integration/IntegrationServiceProvider.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Modules\Integration;
+
+use Illuminate\Support\ServiceProvider;
+use Illuminate\Support\Facades\Route;
+use App\Modules\Integration\Middleware\TenantIdentificationMiddleware;
+
+class IntegrationServiceProvider extends ServiceProvider
+{
+    public function boot()
+    {
+        $this->loadRoutesFrom(__DIR__ . '/Routes/api.php');
+        $this->loadMigrationsFrom(__DIR__ . '/Database/Migrations');
+
+        // Register Middleware Alias
+        Route::aliasMiddleware('integration.tenant', TenantIdentificationMiddleware::class);
+    }
+
+    public function register()
+    {
+        //
+    }
+}