update email template

app/Integrations/Domain/Writers/DnsDomainUserWriter.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Integrations\Domain\Writers;
+
+use App\Integrations\Domain\DTOs\DnsDomainUserData;
+use Illuminate\Support\Facades\DB;
+
+class DnsDomainUserWriter
+{
+    /**
+     * Skips pairs whose domain or customer couldn't be resolved — both columns are NOT NULL.
+     * Matched on (domain_id, user_id), the pivot's own unique key — no legacy_id needed.
+     */
+    public function write(DnsDomainUserData $data): bool
+    {
+        if ($data->domainId === null || $data->customerId === null) {
+            return false;
+        }
+
+        DB::table('dns_domain_user')->updateOrInsert(
+            ['domain_id' => $data->domainId, 'user_id' => $data->customerId],
+            [
+                'created_at' => $data->createdAt,
+                'updated_at' => $data->updatedAt,
+            ]
+        );
+
+        return true;
+    }
+}