TypeError: 'NoneType' object is not subscriptable

[sentry-io]

Update to catch TypeError as well as KeyError

Sentry Issue: STUDIO-EAK

TypeError: 'NoneType' object is not subscriptable
(10 additional frame(s) were not displayed)
...
  File "rest_framework/views.py", line 492, in dispatch
    response = handler(request, *args, **kwargs)
  File "contentcuration/viewsets/base.py", line 520, in list
    return Response(self.serialize(queryset))
  File "contentcuration/viewsets/base.py", line 509, in serialize
    return self.consolidate(list(map(self._map_fields, queryset or [])), queryset)
  File "contentcuration/viewsets/task.py", line 77, in consolidate
    progress = task_result.progress
  File "contentcuration/utils/celery/tasks.py", line 142, in progress
    return self.result["progress"] if self.result else 0

[sentry-io]

Sentry issue: STUDIO-EJP

[bjester]

This will be negated by #3332