- /api/incidents/[id]/similar: embedding backfill on a closed incident hit the closure-lock trigger and turned the whole request into a 503; now skips persistence for closed incidents (vector still used for the query) - addenda: cap body at 5000 chars; include body text in audit_log entry - admin users PATCH: 404 when target user does not exist (was silent ok) - extract shared requireAdmin to lib/auth/require-admin.ts (was duplicated in admin users + sites routes) - extract escapeCsv/rowsToCsv to lib/csv.ts (was duplicated in dashboard export route and lib/reports/jkkp8.ts) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CPf5Rc8QPx6V8KLEEgfKEQ