add refund and event logic

app/Services/Refunds/RefundNotificationService.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Services\Refunds;
+
+use Illuminate\Support\Facades\Log;
+
+class RefundNotificationService
+{
+    public function notifyPending(int $parentId, float $amount, ?string $portalLink = null): void
+    {
+        Log::info('Refund pending notification queued.', [
+            'parent_id' => $parentId,
+            'amount' => round($amount, 2),
+            'portal_link' => $portalLink,
+        ]);
+    }
+}