chore: filter out the removed cycle from issue detail (#6138)

apiserver/plane/app/views/issue/base.py

@@ -445,12 +445,10 @@ class IssueViewSet(BaseViewSet):
             .select_related("workspace", "project", "state", "parent")
             .prefetch_related("assignees", "labels", "issue_module__module")
             .annotate(
-                cycle_id=Case(
-                    When(
-                        issue_cycle__cycle__deleted_at__isnull=True,
-                        then=F("issue_cycle__cycle_id"),
-                    ),
-                    default=None,
+                cycle_id=Subquery(
+                    CycleIssue.objects.filter(issue=OuterRef("id")).values("cycle_id")[
+                        :1
+                    ]
                 )
             )
             .annotate(