Enhance DNS discovery, validation & transfers

Add comprehensive DNS management and input validation, plus safer transfer and logging behavior.

- Add CronHelper utilities for cron scripts and unify logging/formatting.
- Improve InputValidator: sanitizeDomainInput and validateRootDomain (handles multi-level TLDs) and use throughout domain import/create flows to reject subdomains.
- DomainController: refactor DNS refresh to support quick/deep discovery (background deep scans), add endpoints to discover, add/delete/bulk-delete DNS records, import BIND zone files, enrich IP metadata via enrichIpDetails, and strengthen bulk import/reporting messages.
- DnsRecord model: add source column handling (discovered/manual/imported), avoid auto-deleting manual/imported records, and add helpers for deleting, bulk deleting, manual adding and importing zone records.
- Tag, NotificationGroup and Domain transfer logic: unlink groups when ownership changes, remove tags that belong to other users, add audit logging via Logger and improved bulk transfer reporting. TagController/View: show transferable users for admins and skip global tags on transfer.
- Notification channels (Discord, Mattermost, etc.) and EmailHelper: allow explicit subjects and improve payload fields based on notification type.
- Add new migration 029_add_dns_record_source.sql and wire it into the installer; update migrations detection.
- Add new views/partials for confirm/import/transfer modals, update various domain/group/tag templates, and update cron scripts and routes for discovery.

These changes preserve manual/imported DNS records, improve root-domain validation, enable background deep discovery, and add better logging/audit trails for transfers and imports.

cron/check_domains.php

@@ -23,6 +23,7 @@ use App\Models\User;
 use App\Services\WhoisService;
 use App\Services\NotificationService;
 use App\Services\UpdateService;
+use App\Helpers\CronHelper;
 use Core\Database;
 
 // Load environment variables
@@ -56,27 +57,11 @@ try {
 
 // Log file
 $logFile = __DIR__ . '/../logs/cron.log';
+$cron = new CronHelper($logFile);
 
-function logMessage(string $message) {
-    global $logFile;
-    $timestamp = date('Y-m-d H:i:s');
-    file_put_contents($logFile, "[$timestamp] $message\n", FILE_APPEND);
-    echo "[$timestamp] $message\n";
-}
-
-function formatElapsedTime(float $seconds): string {
-    if ($seconds < 60) {
-        return sprintf("%.2f seconds", $seconds);
-    } elseif ($seconds < 3600) {
-        $minutes = floor($seconds / 60);
-        $remainingSeconds = $seconds - ($minutes * 60);
-        return sprintf("%d minute%s %.2f seconds", $minutes, $minutes != 1 ? 's' : '', $remainingSeconds);
-    } else {
-        $hours = floor($seconds / 3600);
-        $remainingMinutes = floor(($seconds - ($hours * 3600)) / 60);
-        $remainingSeconds = $seconds - ($hours * 3600) - ($remainingMinutes * 60);
-        return sprintf("%d hour%s %d minute%s %.2f seconds", $hours, $hours != 1 ? 's' : '', $remainingMinutes, $remainingMinutes != 1 ? 's' : '', $remainingSeconds);
-    }
+function logMessage(string $message): void {
+    global $cron;
+    $cron->log($message);
 }
 
 // Record start time
@@ -806,7 +791,7 @@ $settingModel->updateLastCheckRun();
 // Calculate elapsed time
 $endTime = microtime(true);
 $elapsedTime = $endTime - $startTime;
-$formattedTime = formatElapsedTime($elapsedTime);
+$formattedTime = CronHelper::formatElapsedTime($elapsedTime);
 
 // Summary
 logMessage("\n=== Cron job completed ===");