- ChangePassword/DeleteAccount: failed-attempt lockout matching login escalation, atomic check-increment (no burst), uniform 401 with distinct bodies, passwordless accounts require 2FA unconditionally to delete, NULL-password change-password clear error - erasure: CardDAV dav_cards rows deleted inside the erasure transaction (was fire-and-forget goroutine); S3 profile-pic deletion via pending_s3_deletions outbox + retry job; stale-guest/idle-account batch paths write the outbox in-tx and skip the guessed-bucket fallback - S3_PROFILE_PICS_BUCKET unset -> fail-closed warning (once per process) - scheduler test: 27 jobs (retry-s3-deletions) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai> Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)