fix: shipping debug triggers Fatel Error

related: #54

src/QUI/ERP/Shipping/Debug.php

@@ -12,6 +12,7 @@
 use QUI\ERP\Shipping\Types\ShippingEntry;
 
 use function class_exists;
+use function defined;
 
 /**
  * Class Debug
@@ -122,6 +123,10 @@ public static function generateShippingEntryDebuggingLog(
         $result,
         $debuggingLog
     ): void {
+        if (defined('QUIQQER_AJAX')) {
+            return;
+        }
+
         if (self::isRuleAlreadyDebugged($Entry->getId())) {
             return;
         }

src/QUI/ERP/Shipping/Order/Shipping.php

@@ -11,6 +11,7 @@
 
 use function array_merge;
 use function count;
+use function defined;
 use function dirname;
 use function implode;
 
@@ -70,7 +71,7 @@ public function getBody(): string
         $shippingList = $this->getValidShipping();
 
         // debugging logger
-        if (QUI\ERP\Shipping\Shipping::getInstance()->debuggingEnabled()) {
+        if (QUI\ERP\Shipping\Shipping::getInstance()->debuggingEnabled() && !defined('QUIQQER_AJAX')) {
             QUI\ERP\Shipping\Debug::clearLogStock();
 
             $debugStack = [];

src/QUI/ERP/Shipping/Types/ShippingEntry.php

@@ -721,7 +721,7 @@ public function getShippingRules(): array
         }
 
         // debug shipping entry / rules
-        if ($debugging) {
+        if ($debugging && !defined('QUIQQER_AJAX')) {
             QUI\ERP\Shipping\Debug::enable();
             QUI\ERP\Shipping\Debug::generateShippingEntryDebuggingLog($this, $result, $debuggingLog);
             QUI\ERP\Shipping\Debug::disable();