[backend] Incorporate new status to field description

beat/web/backend/models.py

@@ -481,6 +481,7 @@ class Job(models.Model):
         (FAILED,     'Failed'),
         (SKIPPED,    'Skipped'),
         (CANCELLED,  'Cancelled'),
+        (KILL,       'Kill'),
     )
 
     block = models.OneToOneField('experiments.Block', null=True,