fix(mypy): work around django-plugin annotate crash in comment viewset

apps/comments/wagtail_hooks.py

@@ -1,3 +1,5 @@
+from typing import Any, cast
+
 from django.db.models import Count, Q
 from django.utils.translation import gettext_lazy as _
 from django.utils.translation import ngettext
@@ -49,22 +51,21 @@ class CommentViewSet(SnippetViewSet):
     add_to_admin_menu = True
 
     def get_queryset(self, request):
-        return (
-            self.model.objects.all()
-            .select_related("article", "parent")
-            .annotate(
-                pending_in_article=Count(
-                    "article__comments",
-                    filter=Q(article__comments__is_approved=False),
-                    distinct=True,
-                )
+        base_qs = self.model.objects.all().select_related("article", "parent")
+        # mypy-django-plugin currently crashes on QuerySet.annotate() in this file.
+        typed_qs = cast(Any, base_qs)
+        return typed_qs.annotate(
+            pending_in_article=Count(
+                "article__comments",
+                filter=Q(article__comments__is_approved=False),
+                distinct=True,
             )
         )
 
     def pending_in_article(self, obj):
         return obj.pending_in_article
 
-    pending_in_article.short_description = "Pending (article)"
+    pending_in_article.short_description = "Pending (article)"  # type: ignore[attr-defined]
 
 
 register_snippet(CommentViewSet)