refactor(phpunit): ensure consistent handling of processing status id

This commit improves the way processing status id is handled across different methods in the
ProcessingStatus module. Now, we consistently cast processing status id as string before passing it
to the config setter methods, eliminating any potential issues that might occur due to variable
type inconsistencies. Changes are applied to the Factory and Handler classes alike.

Related: #172

src/QUI/ERP/Order/ProcessingStatus/Factory.php

@@ -31,7 +31,7 @@ class Factory extends QUI\Utils\Singleton
      * @throws QUI\Exception
      * @todo permissions
      */
-    public function createProcessingStatus(int|string $id, string $color, array $title): void
+    public function createProcessingStatus(int | string $id, string $color, array $title): void
     {
         $list = Handler::getInstance()->getList();
         $id = (int)$id;
@@ -48,7 +48,7 @@ public function createProcessingStatus(int|string $id, string $color, array $tit
         $Package = QUI::getPackage('quiqqer/order');
         $Config = $Package->getConfig();
 
-        $Config->setValue('processing_status', $id, $color);
+        $Config->setValue('processing_status', (string)$id, $color);
         $Config->save();
 
         // translations

src/QUI/ERP/Order/ProcessingStatus/Handler.php

@@ -149,7 +149,7 @@ public function deleteProcessingStatus(int | string $id): void
         QUI\Translator::publish('quiqqer/order');
 
         // update config
-        $this->OrderConfig->del('processing_status', $Status->getId());
+        $this->OrderConfig->del('processing_status', (string)$Status->getId());
         $this->OrderConfig->save();
     }
 
@@ -168,7 +168,7 @@ public function setProcessingStatusNotification(int $id, bool $notify): void
         $Status = $this->getProcessingStatus($id);
 
         // update config
-        $this->OrderConfig->setValue('processing_status_notification', $Status->getId(), $notify ? "1" : "0");
+        $this->OrderConfig->setValue('processing_status_notification', (string)$Status->getId(), $notify ? "1" : "0");
         $this->OrderConfig->save();
     }
 
@@ -213,7 +213,7 @@ public function updateProcessingStatus(int | string $id, int | string $color, ar
         QUI\Translator::publish('quiqqer/order');
 
         // update config
-        $this->OrderConfig->setValue('processing_status', $Status->getId(), $color);
+        $this->OrderConfig->setValue('processing_status', (string)$Status->getId(), $color);
         $this->OrderConfig->save();
     }