feat(notification): 實作通知輪詢與優化顯示名稱

- 新增通知輪詢 API 與前端自動更新機制
- 修正生產工單單號格式為 PRO-YYYYMMDD-XX
- 確保通知顯示實際建立者名稱而非系統

app/Modules/Procurement/ProcurementServiceProvider.php

@@ -6,6 +6,10 @@ use Illuminate\Support\ServiceProvider;
 use App\Modules\Procurement\Contracts\ProcurementServiceInterface;
 use App\Modules\Procurement\Services\ProcurementService;
 
+
+use App\Modules\Procurement\Models\PurchaseOrder;
+use App\Modules\Procurement\Observers\PurchaseOrderObserver;
+
 class ProcurementServiceProvider extends ServiceProvider
 {
     public function register(): void
@@ -15,6 +19,6 @@ class ProcurementServiceProvider extends ServiceProvider
 
     public function boot(): void
     {
-        //
+        PurchaseOrder::observe(PurchaseOrderObserver::class);
     }
 }