'Discussion is locked' alert is shown when a project's parent is archived

I noticed that when a group is archived, a "Discussion is locked" alert is shown in issues (in child projects), instead of showing "This project is archived and cannot be commented on.".

This is because we expose issue.project.archived? instead of issue.project.project_namespace.self_or_ancestor_archived? in app/serializers/issue_entity.rb.

Likely, the same applies for merge requests.

Note: The archive_group feature flag must be enabled.

Implementation Guide

Subject: Fix project archived banner
---
Index: app/serializers/issue_entity.rb
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/app/serializers/issue_entity.rb b/app/serializers/issue_entity.rb
--- a/app/serializers/issue_entity.rb	(revision 30a34a24658e1b52066f4f208f10e2334c42bc96)
+++ b/app/serializers/issue_entity.rb	(date 1751519690420)
@@ -81,7 +81,7 @@
   end
 
   expose :is_project_archived do |issue|
-    issue.project.archived?
+    issue.project.self_or_ancestors_archived?
   end
 
   expose :archived_project_docs_path, if: ->(issue) { issue.project.archived? } do |issue|
Index: app/serializers/merge_request_noteable_entity.rb
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/app/serializers/merge_request_noteable_entity.rb b/app/serializers/merge_request_noteable_entity.rb
--- a/app/serializers/merge_request_noteable_entity.rb	(revision 30a34a24658e1b52066f4f208f10e2334c42bc96)
+++ b/app/serializers/merge_request_noteable_entity.rb	(date 1751519977521)
@@ -60,7 +60,7 @@
   end
 
   expose :is_project_archived do |merge_request|
-    merge_request.project.archived?
+    merge_request.project.self_or_ancestors_archived?
   end
 
   expose :project_id
Index: app/graphql/types/work_item_type.rb
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/app/graphql/types/work_item_type.rb b/app/graphql/types/work_item_type.rb
--- a/app/graphql/types/work_item_type.rb	(revision 30a34a24658e1b52066f4f208f10e2334c42bc96)
+++ b/app/graphql/types/work_item_type.rb	(date 1751519902492)
@@ -144,7 +144,7 @@
     def archived
       return false if object.project.blank?
 
-      object.project.archived?
+      object.project.self_or_ancestors_archived?
     end
 
     def show_plan_upgrade_promotion

1. Replace calls to project.archived to project.self_or_ancestors_archived? in the following files:
   • app/serializers/issue_entity.rb
   • app/serializers/merge_request_noteable_entity.rb
   • app/graphql/types/work_item_type.rb
2. Update the test accordingly.