Add DNS monitoring and refresh functionality

Introduce DNS monitoring: add DnsService (comprehensive DNS lookup, crt.sh discovery, Cloudflare detection, IP enrichment) and a new DnsRecord model to persist snapshots, manage diffs, and provide queries/stats. Update DomainController to support a dns_monitoring_enabled flag, refactor WHOIS/DNS refresh logic into performWhoisRefresh/performDnsRefresh, and add endpoints for refreshWhois, refreshDns and refreshAll; send notifications when DNS monitoring is toggled. Add UI templates/tabs for DNS, billing, notifications, overview, SSL and WHOIS and wire DNS data into the domain view; expose cached IP details. Add cron/check_dns.php and migration 027_add_dns_monitoring.sql (and include it in installer migration lists). Other tweaks: safer EmailHelper subject handling, TldRegistry search improvements, domain sorting using an effective status (expiring_soon), Discord channel null-safe fields, settings UI additions (domain_view_template and cron staleness warnings), and route/migration updates. This enables scheduled and manual DNS scans with persistent records and notifications.

app/Views/search/results.twig

@@ -238,6 +238,7 @@
                 <!-- Add Domain Button -->
                 <div class="mt-6 pt-6 border-t border-gray-200 dark:border-slate-700">
                     <form method="POST" action="/domains/store" class="flex items-center justify-between">
+                        {{ csrf_field()|raw }}
                         <input type="hidden" name="domain_name" value="{{ whoisData.domain }}">
                         <p class="text-sm text-gray-600 dark:text-slate-400">Want to monitor this domain?</p>
                         <button type="submit" class="inline-flex items-center px-4 py-2 bg-primary text-white rounded-lg hover:bg-primary-dark transition-colors text-sm font-medium">