[CC-2868] [CC-2868] Add chargeback webhook handling.

Author: Ryouzanpaku

test/integration/WebhookTest.php

@@ -231,7 +231,7 @@ public function testFetchResourceFromEvent(): void
         $webhookNotification = [
             'event' => 'chargebacks',
             'publicKey' => 's-pub-xyz',
-            'retrieveUrl' => 'https=>//sbx-api.unzer.com/v1/payments/' . self::CHARGEDBACK_PAYMENT_ID . '/charges/s-chg-1/chargebacks/s-cbk-1',
+            'retrieveUrl' => 'https://sbx-api.unzer.com/v1/payments/' . self::CHARGEDBACK_PAYMENT_ID . '/charges/s-chg-1/chargebacks/s-cbk-1',
             'paymentId' => self::CHARGEDBACK_PAYMENT_ID
         ];
 

test/unit/Services/WebhooksServiceTest.php

@@ -331,7 +331,7 @@ public function fetchResourceByEventWithEmptyRetrieveUrlShouldThrowException():
     }
 
     /**
-     * Verify exception is thrown if the retrieveURL is empty.
+     * Verify that a chargeback is returned from a webhook event.
      *
      * @test
      */
@@ -341,9 +341,9 @@ public function fetchChargebackByEventShouldReturnChargeback(): void
         $unzer = new Unzer('s-priv-1234');
         $webhookService = new WebhookService($unzer);
 
-        $paymentId = 'p-pay-42';
-        $chargeId = 'p-chg-1';
-        $chargebackId = 'p-cbk-1';
+        $paymentId = 's-pay-42';
+        $chargeId = 's-chg-1';
+        $chargebackId = 's-cbk-1';
         $retrieveUrl = "https://api.unzer.com/v1/payments/{$paymentId}/charges/{$chargeId}/chargebacks/{$chargebackId}";
 
         // Partial mock: keep original behavior except fetchChargebackById which we want to intercept