### Description This is a follow-up issue for gitlab-ce#31847 after gitlab-ce!12148 is merged. This should be done after gitlab-ce#40047 When we create a commit comment in the context of a merge request, we should be able to create a discussion that needs to be resolved before the merge request can be merged. ### Proposal The current page has a "Start discussion" button that can be used, but this type of discussion is not resolvable. ### Links / references ### Documentation blurb #### Overview What is it? Why should someone use this feature? This is to support per-commit review workflows. What is the underlying (business) problem? We can add discussion on a commit, that will show up How do you use this feature? ``` Open a merge request Commits tab -> click a commit Commit page (with merge_request context) -> click View details Start a discussion on the commit (not on a diff) ``` #### Use cases Who is this for? Provide one or more use cases. See gitlab-ce#39380, gitlab-ce#35287 This could be use to comment on a commit's metadata, like the commit message or length and block the merge request from being merged if the comment is not resolved. ### Feature checklist Make sure these are completed before closing the issue, with a link to the relevant commit. - [ ] [Feature assurance](https://about.gitlab.com/handbook/product/#feature-assurance) - [ ] Documentation - [ ] Added to [features.yml](https://gitlab.com/gitlab-com/www-gitlab-com/blob/master/data/features.yml)