## Summary Feature flag for `approval_committer_emails_from_diff` introduced in !223603. This flag controls whether the approval committer filtering flow uses a direct SQL UNION query to extract committer emails from `merge_request_diff_commits`, instead of instantiating all `MergeRequestDiffCommit` Ruby objects via the `committers()` method. ## Owners - Team: code review - Feature issue: !223603 ## Expected Artifacts - **Feature flag**: `approval_committer_emails_from_diff` - **Type**: `gitlab_com_derisk` - **Default**: disabled ## Rollout Plan 1. Enable on staging 2. Enable on gitlab.com for a percentage of projects 3. Enable globally on gitlab.com 4. Enable by default (remove flag)