feat: call off single disposition as admin with optional notification

src/Entity/Assignment.php

@@ -487,6 +487,13 @@ class Assignment implements BlameableEntityInterface, TimestampableEntityInterfa
         });
     }
 
+    public function getActiveDispositions(): Collection
+    {
+        return $this->dispositions->filter(function (Disposition $disposition) {
+            return Disposition::STATUS_CALLED_OFF !== $disposition->getStatus();
+        });
+    }
+
     public function getConfirmedDispositions(): Collection
     {
         return $this->dispositions->filter(function (Disposition $disposition) {