Sent mails were kept forever, and digest bodies name page titles and
actors — an unbounded copy of content-adjacent data. A new daily
mail-outbox-retention job deletes SENT rows (by sentAt) and permanently
FAILED rows (by nextAttemptAt, the last attempt's stamp) once they pass
mail.outboxRetentionDays (instance setting, default 30). PENDING rows —
including failed-but-retryable ones — stay the retry loop's alone.
Decision recorded (security.md §Privacy, residual-risk note for #231):
digest mails keep carrying page titles for now — there is no per-page
classification marking yet to key a suppression on (ADR 0022 / M32
revisits), and a VS-NfD reference configuration can leave SMTP
unconfigured entirely.
Job-count fence in system.spec: 8 -> 9.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0168Ph5uBmHm8X28CSVpbpnJ
