feat: assignment call off

src/Event/AssignmentCalledOffEvent.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace App\Event;
+
+use App\Entity\Assignment;
+use Symfony\Contracts\EventDispatcher\Event;
+
+class AssignmentCalledOffEvent extends Event
+{
+    public const NAME = 'assignment.called_off';
+
+    public function __construct(private readonly Assignment $assignment)
+    {}
+
+    public function getAssignment(): Assignment
+    {
+        return $this->assignment;
+    }
+}