Sub-ticket of MARS-39 Schema cleanup drops — accessRequests.correoAlternativo (100% null), helpArticles+helpArticleTags+vHelpArticles (0-row never-used), vErrorsLast5/10/20 (keep vErrorsLast25), dead tickets+ticketEvents (16 closed rows/0 events vs live supportTickets). Verify zero src refs before each drop. · mars