Enable track_issue_activity_actions feature by default

config/feature_flags/development/track_issue_activity_actions.yml

@@ -4,4 +4,4 @@ introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/40904
 rollout_issue_url:
 group: group::project_management
 type: development
-default_enabled: false
\ No newline at end of file
+default_enabled: true

lib/gitlab/usage_data_counters/issue_activity_unique_counter.rb

@@ -105,7 +105,7 @@ module Gitlab
         private
 
         def track_unique_action(action, author, time)
-          return unless Feature.enabled?(:track_issue_activity_actions)
+          return unless Feature.enabled?(:track_issue_activity_actions, default_enabled: true)
           return unless author
 
           Gitlab::UsageDataCounters::HLLRedisCounter.track_event(author.id, action, time)