fix: getCurrentStatusId is not available at every erp entity

src/QUI/ERP/ErpEntityData.php

@@ -2,17 +2,25 @@
 
 namespace QUI\ERP;
 
+use function method_exists;
+
 trait ErpEntityData
 {
     public function getReferenceData(): array
     {
+        $currentStatus = null;
+
+        if (method_exists($this, 'getCurrentStatusId')) {
+            $currentStatus = $this->getCurrentStatusId();
+        }
+
         return [
             'id' => $this->getUUID(),
             'id_str' => $this->getPrefixedNumber(), // old
             'prefixedNumber' => $this->getPrefixedNumber(),
             'uuid' => $this->getUUID(),
             'globalProcessId' => $this->getGlobalProcessId(),
-            'currentStatusId' => $this->getCurrentStatusId(),
+            'currentStatusId' => $currentStatus
         ];
     }
 }