set correct attempt when retry notification job

src/Loggers/SentNotificationLogger.php

@@ -24,7 +24,19 @@ public function logSendingNotification(NotificationSending $event): ?SentNotific
             return null;
         }
 
-        $event->notification::$attempt += 1;
+        $currentAttempt = SentNotificationLog::query()
+            ->where('notification_id', $event->notification->id)
+            ->where('channel', $event->channel)
+            ->max('attempt');
+
+        // when you retry a job after it failed after several tries, the attempt of the instance will be reset as
+        // it will be pushed as a new instance with the same notification id to the queue.
+        // Therefor we need to increment the attempt manually by looking it up in the logs table.
+        if ($currentAttempt > $event->notification::$attempt) {
+            $event->notification::$attempt = $currentAttempt + 1;
+        } else {
+            $event->notification::$attempt++;
+        }
 
         /** @var SentNotificationLog $notification */
         $notification = SentNotificationLog::create([