docs(engagement): Phase 14 as built — retention #205

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whitlocktech merged 2 commits from docs/engagement-phase-14 into main 2026-09-01 20:56:26 +00:00
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@@ -3937,7 +3937,8 @@ bounds and the cooldown check), two `.db` additions (`outbox.pruneTerminal`, `se
new Admin → Engagement → **Retention** screen, a per-row **Lift** button on Suppressions, and one line
under the Send Log's pager. Two indexes (`idx_engo_sweep`, `idx_engs_sweep`) — every existing index on
those tables has `created_at` in *second* position, which serves a per-rule window and is useless to a
whole-table horizon. Reference: `BACKEND_DESIGN.md` § *Engagement retention*.
whole-table horizon. Reference: `BACKEND_DESIGN.md` § *Engagement retention*. PRs: **website#182 · docs#205 ·
runicgateway.com#29**.
**Three findings.**