## Summary The `Projects::CommitController` currently has logic for handling discussions that could be consolidated by using the `RapidDiffs::DiscussionActions` concern introduced in !214069. ## Current State After adding the `POST discussions` endpoint using the `RapidDiffs::DiscussionActions` concern, there are opportunities to refactor existing code: 1. The `rapid_diffs_enabled?` method is now available but not used in other parts of the controller 2. The `GET discussions` endpoint could potentially leverage the concern as well ## Proposed Changes - Refactor existing discussion-related code in `Projects::CommitController` to use the `RapidDiffs::DiscussionActions` concern - Move the `GET discussions` endpoint to use the concern for consistency ## Related - #571466