payment hot fix : $p->getCreatedAt() does not always exist

src/Repository/PaymentRepository.php

@@ -63,12 +63,16 @@ class PaymentRepository extends ServiceEntityRepository
                 $p->setStartingPaymentAnalysisStatus('NOT CONCERNED');
                 continue;
             }
-            $createdAt = clone $p->getCreatedAt(); //don't modify original object
-            $timeout = $createdAt->add(\DateInterval::createFromDateString("10 minutes"));
-            if ($timeout < new \DateTime()) {
+            if (!$p->getCreatedAt()) {
                 $p->setStartingPaymentAnalysisStatus('TIMEOUT');
             } else {
-                return $timeout;
+                $createdAt = clone $p->getCreatedAt(); //don't modify original object
+                $timeout = $createdAt->add(\DateInterval::createFromDateString("10 minutes"));
+                if ($timeout < new \DateTime()) {
+                    $p->setStartingPaymentAnalysisStatus('TIMEOUT');
+                } else {
+                    return $timeout;
+                }
             }
         }
         //Note : some fields updates are done in this method to exclude non-candidate payment from future research.