<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=534957) </details> <!--IssueSummary end--> In the Project model, there are two [CI pipeline associations](https://gitlab.com/gitlab-org/gitlab/-/blob/53c9c93336109340bb97ab3a935b8b7f969eda8a/app/models/project.rb#L445-449): `all_pipelines` and `ci_pipelines`. When exporting projects, we currently use the `ci_pipelines` association. This omits pipelines with "[dangling sources](https://gitlab.com/gitlab-org/gitlab/-/blob/d996802255df23ea7857868ce1375efb6883c525/app/models/concerns/enums/ci/pipeline.rb#L76)". We should import all pipelines, using the `all_pipelines` association. As we do not have reliable data on how this will effect import performance, we will put this change behind a feature flag with a default of `true` so that we can observe performance and revert quickly to importing only `ci_pipelines` should any issues arise. See https://gitlab.com/gitlab-com/request-for-help/-/issues/2601#note_2426915902 for more context.