Initial Ladill Hosting app with Gitea deploy pipeline.

Shared web hosting extracted from the platform monolith, with CI deploy
to /var/www/ladill-hosting matching Bird/Domains/Email.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Jobs/ProvisionDomainSlaveZoneJob.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace App\Jobs;
+
+use App\Models\Domain;
+use App\Services\Dns\PowerDnsClient;
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Foundation\Bus\Dispatchable;
+use Illuminate\Queue\InteractsWithQueue;
+use Illuminate\Queue\SerializesModels;
+
+class ProvisionDomainSlaveZoneJob implements ShouldQueue
+{
+    use Dispatchable;
+    use InteractsWithQueue;
+    use Queueable;
+    use SerializesModels;
+
+    public int $tries = 3;
+
+    public int $backoff = 90;
+
+    public function __construct(public int $domainId)
+    {
+    }
+
+    public function handle(PowerDnsClient $client): void
+    {
+        $domain = Domain::query()->find($this->domainId);
+        if (!$domain || !$domain->isActiveForMail()) {
+            return;
+        }
+
+        $masters = config('pdns.slave_masters', []);
+        $client->ensureSlaveZone($domain, $masters);
+    }
+}