MC-5014

Dependent follow-up for the Iris/Life Manager attention redesign. Dependency: - Start after the Attention Gate foundation ticket is done (ledger + `should_notify` helper), and after MC-5011 send ledger is available. Context: - Phase B of the Iris attention plan requires integrating the top 2–3 noisy emitters and proving critical bypass works. - MC-5003 classified `life-manager-scan` as `gate_now`, `life-manager-digest` and `morning-briefing` as downgrade candidates, and padel helpers as leave-alone/critical-only. Goal: Integrate the Attention Gate MVP into the first top noisy emitters with critical-bypass tests and an auditable rollout path. Scope: - Wire the `should_notify` helper into `life-manager-scan` first, then `life-manager-digest` and/or `morning-briefing` if foundation evidence supports it. - Start in dry-run or shadow mode if needed, then enable only the safest reversible gate behavior. - Preserve critical bypass for same-day/direct-Elmar/safety/legal/money/travel/calendar/compliance/today-blocking alerts. - Use the send ledger to compare before/after notification volume. - Update the Iris attention plan Phase B gate note. Acceptance: - Top noisy emitter integration is implemented with tests. - Synthetic critical bypass test proves urgent items still notify. - Non-critical sample candidates are logged/batched instead of interrupting. - Before/after or shadow-mode evidence is recorded. - Rollback path is documented. - Comment whether Phase C Digest Aggregator MVP should be queued next. Expected check-in: after gate foundation closes + 1 working session.