MC-5011

Continue the Iris/Life Manager attention redesign after MC-5003 and MC-5004. Context: - MC-5003 produced the emitter/message-volume baseline. - MC-5004 shipped the first reversible prompt/config noise-reduction slice. - The phase gate log says the next smallest safe slice is append-only Telegram send-success logging before enforcing a full attention gate. Goal: Add the smallest append-only send-success ledger for Iris/Life/Telegram notifications so future noise-reduction work has canonical delivery evidence instead of estimating from task output markers and scattered logs. Scope: - Identify the canonical send path(s) used by notify.py, scheduler delivery, Life Manager, and Iris tasks. - Add an append-only ledger for successful Telegram/origin sends, with enough fields to support per-emitter/day counts and later attention-gate decisions. - Keep it low-risk and reversible; do not change notification routing or gating behavior in this ticket. - Prefer one shared helper over per-task bespoke logging. - Update the Iris attention plan phase gate with evidence and rollback notes. Acceptance: - Successful Telegram/origin notification sends are logged to a durable append-only location. - Ledger fields include timestamp, source/emitter/task where available, delivery target/channel/thread when safe, message class/type where available, and success/error status if applicable. - Existing critical sends still work; no new external side-effect commands are introduced. - Add tests or a dry-run/non-sending validation proving ledger writes without sending Telegram. - Run relevant syntax/tests. - Comment verification evidence and next recommended slice. Expected check-in: 2026-06-12 09:30 SAST.