Enable sync_traversal_ids by default in its yaml

app/models/namespaces/traversal/linear.rb

@@ -49,7 +49,7 @@ module Namespaces
       end
 
       def sync_traversal_ids?
-        Feature.enabled?(:sync_traversal_ids, root_ancestor, default_enabled: true)
+        Feature.enabled?(:sync_traversal_ids, root_ancestor, default_enabled: :yaml)
       end
 
       def use_traversal_ids?

changelogs/unreleased/330470-default-enable-sync_traversal_ids.yml

 ---
-title: Cache traversal path of namespaces
+title: Sync traversal path of namespaces
 merge_request: 61329
 author:
 type: performance

config/feature_flags/development/sync_traversal_ids.yml

@@ -4,4 +4,4 @@ introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/52854
 rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/321947
 group: group::access
 type: development
-default_enabled: false
+default_enabled: true