refactor: use DEMO_TENANT_PORT env var for demo logic isolation

config/tenancy.php

@@ -20,6 +20,17 @@ return [
         array_map('trim', explode(',', env('CENTRAL_DOMAINS', '127.0.0.1,localhost')))
     ),
 
+    /*
+    |--------------------------------------------------------------------------
+    | Demo Mode Tenant Port
+    |--------------------------------------------------------------------------
+    |
+    | If set, requests on this port will be treated as tenant requests
+    | regardless of the host domain. Useful for IP-based demo access.
+    |
+    */
+    'demo_tenant_port' => env('DEMO_TENANT_PORT'),
+
     /**
      * Tenancy bootstrappers are executed when tenancy is initialized.
      * Their responsibility is making Laravel features tenant-aware.