Add SSL monitoring (Svc, model, cron, UI)

Introduce SSL certificate monitoring: add SslService for fetching/parsing certs and parsing monitor targets, SslCertificate model for storing snapshots and managing monitored targets, and cron/check_ssl.php for scheduled checks. Extend DomainController with many SSL endpoints and helpers (add/refresh/bulk refresh/delete/bulk delete, snapshot handling, formatting, stats, safety checks) and surface SSL data in domain views. Add NotificationService helpers to create/send SSL alerts, update Installer to include new migration, add migration 028 to create ssl_certificates table, bump app version default to 1.1.5, update changelog, and modify routes and templates to include SSL tab and related UI. Logs and basic validation/error handling are included to surface SSL issues and protect default root-target behavior.

app/Models/Setting.php

@@ -122,7 +122,7 @@ class Setting extends Model
      */
     public function getAppVersion(): string
     {
-        return $this->getValue('app_version', '1.1.4');
+        return $this->getValue('app_version', '1.1.5');
     }
 
     /**