fix: correct PaymentAlreadyProcessedException location and add phpunit CVE to audit ignore

- Rename ' Exceptions/' -> 'Exceptions/' (remove erroneous leading space)
- Add full class body with namespace and DomainException extension
- Add GHSA-vvj3-c3rp-c85p (phpunit CVE-2026-24765) to composer audit ignore list

Author: AdilAzhari

app/Domain/Payment/ Exceptions/PaymentAlreadyProcessedException.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Domain\Payment\Exceptions;
+
+use DomainException;
+
+final class PaymentAlreadyProcessedException extends DomainException
+{
+    public function __construct(
+        string $message = 'This payment has already been processed.'
+    ) {
+        parent::__construct($message);
+    }
+}

app/Domain/Payment/Exceptions/PaymentAlreadyProcessedException.php

@@ -105,7 +105,8 @@
                 "GHSA-r39x-jcww-82v6",
                 "GHSA-4486-gxhx-5mg7",
                 "GHSA-hh8v-hgvp-g3f5",
-                "GHSA-4v6x-c7xx-hw9f"
+                "GHSA-4v6x-c7xx-hw9f",
+                "GHSA-vvj3-c3rp-c85p"
             ]
         }
     },