refac: article reads, story delete, no leaks, stored SEO status, rate limit, cleanup (%site%, article repo split, old lang repos, one default per site rule to domain)

api/pkg/apperr/messages.go

@@ -172,6 +172,8 @@ const ConflictingArticlesHeader = "X-Conflicting-Articles"
 const StoryMoveRequiredErrorMessage = "story_move_required"
 const StoryBusyErrorMessage = "story_busy"
 const TargetSiteDeletedErrorMessage = "target_site_deleted"
+const MoveStoryFailedErrorMessage = "Failed to move story"
+const DeleteArticleFailedErrorMessage = "Failed to delete article"
 
 const ArticleNotFoundCode = "article_not_found"
 const LanguageNotAvailableCode = "language_not_available"