update email template

app/Integrations/Domain/Support/DnsServerIdResolver.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace App\Integrations\Domain\Support;
+
+use Illuminate\Support\Facades\DB;
+
+/** Resolves a source `dns_manager_servers.id` to the local row via `legacy_id`. */
+class DnsServerIdResolver
+{
+    /** @var array<int, int>|null */
+    private static ?array $map = null;
+
+    public function resolve(int $legacyServerId): ?int
+    {
+        self::$map ??= DB::table('dns_manager_servers')->whereNotNull('legacy_id')->pluck('id', 'legacy_id')->all();
+
+        return self::$map[$legacyServerId] ?? null;
+    }
+}