Resource instance detail page raises 500 if graph is unpublished

[jacobtylerwalls]

The UI just shows a spinner when accessing a resource instance detail page for a graph that has been unpublished.

1. Create a graph with a data collecting node, and publish it.
2. Create an instance. Leave this tab open.
3. From another tab, unpublish the graph.
4. Refresh the tab from step 2 (or, navigate to Recent Edits and click the UUID for the instance you created).

Result: UI spinner
Version: 7.4

---

500 error:

Traceback (most recent call last):
  File "/Users/jwalls/prj/venv/lib/python3.10/site-packages/django/core/handlers/exception.py", line 47, in inner
    response = get_response(request)
  File "/Users/jwalls/prj/venv/lib/python3.10/site-packages/django/core/handlers/base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/Users/jwalls/prj/venv/lib/python3.10/site-packages/django/views/generic/base.py", line 70, in view
    return self.dispatch(request, *args, **kwargs)
  File "/Users/jwalls/prj/arches/arches/app/views/api.py", line 107, in dispatch
    return super(APIBase, self).dispatch(request, *args, **kwargs)
  File "/Users/jwalls/prj/venv/lib/python3.10/site-packages/django/views/generic/base.py", line 98, in dispatch
    return handler(request, *args, **kwargs)
  File "/Users/jwalls/prj/arches/arches/app/views/api.py", line 1256, in get
    {
  File "/Users/jwalls/prj/arches/arches/app/views/api.py", line 1257, in <dictcomp>
    resource.pk: resource.to_json(compact=compact, version=version, hide_hidden_nodes=hide_hidden_nodes, user=user, perm=perm)
  File "/Users/jwalls/prj/arches/arches/app/models/resource.py", line 776, in to_json
    return LabelBasedGraphV2.from_resource(
  File "/Users/jwalls/prj/arches/arches/app/utils/label_based_graph_v2.py", line 217, in from_resource
    published_graph = models.PublishedGraph.objects.get(publication=resource.graph.publication, language=user_language)
  File "/Users/jwalls/prj/venv/lib/python3.10/site-packages/django/db/models/manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/Users/jwalls/prj/venv/lib/python3.10/site-packages/django/db/models/query.py", line 435, in get
    raise self.model.DoesNotExist(
arches.app.models.models.PublishedGraph.DoesNotExist: PublishedGraph matching query does not exist.
[31/Jul/2023 12:19:10] "GET /api/bulk_disambiguated_resource_instance?v=beta&resource_ids=ed9edcbc-efdd-4bbb-af52-94302d971aa3 HTTP/1.1" 500 142259