Change Details

Subscribe to the `ArticlePurge` hook to wipe the cached constraint check results for that entity. #patch-for-review (includes two minor not-really-related refactorings which the later commits are based on): - [ ] [unrelated refactoring 1](https://gerrit.wikimedia.org/r/399842) - [ ] [unrelated refactoring 2](https://gerrit.wikimedia.org/r/399843) - [ ] [refactoring](https://gerrit.wikimedia.org/r/399850) - [ ] [`ArticlePurge` hook](https://gerrit.wikimedia.org/r/399851)

Subscribe to the `ArticlePurge` hook to wipe the cached constraint check results for that entity. #patch-for-review (includes two minor not-really-related refactorings which the later commits are based on): - [ ] [unrelated refactoring 1](https://gerrit.wikimedia.org/r/399842) - [ ] [unrelated refactoring 2](https://gerrit.wikimedia.org/r/399843) - [ ] [`ResultsCache` refactoring](https://gerrit.wikimedia.org/r/399850) - [ ] [`ArticlePurge` hook](https://gerrit.wikimedia.org/r/399851)

Subscribe to the `ArticlePurge` hook to wipe the cached constraint check results for that entity. #patch-for-review (includes two minor not-really-related refactorings which the later commits are based on): - [ ] [unrelated refactoring 1](https://gerrit.wikimedia.org/r/399842) - [ ] [unrelated refactoring 2](https://gerrit.wikimedia.org/r/399843) - [ ] [`ResultsCache` refactoring](https://gerrit.wikimedia.org/r/399850) - [ ] [`ArticlePurge` hook](https://gerrit.wikimedia.org/r/399851)