Refactoring: extract process handling from async job.

app/Enums/ProcessStatus.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App\Enums;
+
+enum ProcessStatus: string
+{
+    case HOLDING = 'holding';
+    case IN_PROGRESS = 'in_progress';
+    case FINISHED = 'finished';
+    case ERROR = 'error';
+}