feat(notifications): alert oversight review queues

docs/architecture.md

@@ -321,3 +321,24 @@ time by the static `/missing-item-icon.svg` asset through the shared
 `ItemIcon` component; the placeholder is never inserted into
 `game_data_icons`. A later edit or proposal can attach the real icon without
 recreating or replacing the canonical item.
+# Oversight notification dispatch
+
+New Data Change and Avatar Oversight review items are routed only to agents who
+currently hold `data.approve` or `avatars.review` respectively. Each reviewer
+chooses Immediate, 15-minute, one-hour, or daily delivery independently for
+each authorized queue. Immediate alerts are created during submission;
+consolidated alerts are persisted in `oversight_notification_queue`.
+
+Production must run the idempotent dispatcher once per minute from exactly one
+scheduler instance:
+
+```text
+* * * * * cd /path/to/shd.build && npm run notifications:oversight:production
+```
+
+The dispatcher groups due rows by reviewer, queue, cadence, and delivery
+window. Daily rows are assigned to the next 10:00 AM wall-clock boundary in
+`America/New_York`, including daylight-saving transitions. Successfully
+dispatched rows retain `delivered_at` evidence and are never selected again.
+The existing ISAC notification delivery preferences still determine optional
+browser and email fan-out after the consolidated inbox message is created.