docs(09): create phase plan (2 plans, 2 waves) — outboxTrigger + drain signal wiring

.planning/ROADMAP.md

@@ -136,7 +136,16 @@ Make FamilySync configurable, administrable, and maintainable for real multi-mem
   - **Create-before-delete under concurrent enqueues** (Pitfall 6): enqueue CREATE before DELETE; do not fire the signal between the two inserts of a move (publish after both inserts / after the transaction commits).
   - Hard constraints: `setInterval` only (no node-cron); single-process by design — **no Redis** for the drain (Redis stays for list SSE); all outbox guarantees (fresh-etag-before-PUT, 412 conflict flow, per-uid exactly-once) unchanged.
 
-**Plans**: TBD
+**Plans**: 2 plans (2 waves)
+
+Plans:
+**Wave 1**
+
+- [ ] 09-01-PLAN.md — TDD: outboxTrigger.ts (zero-dep EventEmitter signal) + scheduleOutboxDrain wrapper / drainRequested trailing-re-drain loop + initOutboxTrigger in outboxWorker.ts; trigger-wiring tests (SC-1, SC-4/D-07, D-05) (Wave 1)
+
+**Wave 2** *(blocked on Wave 1 completion)*
+
+- [ ] 09-02-PLAN.md — Four post-commit signalOutboxDrain() publish sites in events.ts (create / edit-as-move-after-transaction / same-cal update / delete) + initOutboxTrigger() startup wiring under isMainModule() in index.ts (Wave 2)
 
 ### Phase 10: Admin Role & Settings
 
@@ -308,7 +317,7 @@ Plans:
 | 6. UX Polish                     | v1.0 | 6/6   | Complete | 2026-06-10 |
 | 7. Mobile Test Harness           | v1.1 | 4/4 | Complete    | 2026-06-11 |
 | 8. Gitea CI                      | v1.1 | 4/4 | Complete   | 2026-06-11 |
-| 9. Faster Write-Back             | v1.1 | 0/?   | Not started | -       |
+| 9. Faster Write-Back             | v1.1 | 0/2   | Not started | -       |
 | 10. Admin Role & Settings        | v1.1 | 0/?   | Not started | -       |
 | 11. Per-Event Reminders          | v1.1 | 0/?   | Not started | -       |
 | 12. Initial Setup Wizard         | v1.1 | 0/?   | Not started | -       |