Feat: Add status to assignments to control applications

src/Security/Voter/AssignmentVoter.php

@@ -43,6 +43,11 @@ class AssignmentVoter extends Voter
         /** @var Assignment $assignment */
         $assignment = $subject;
 
+        // Only allow applications to open assignments
+        if (Assignment::STATUS_CLOSED === $assignment->getStatus()) {
+            return false;
+        }
+
         // Only allow applications on empty slots
         $availableSlots = (int) $assignment->getAvailableDispositions();
         if (0 < $availableSlots) {