night 2026-09-13/14: first "be a customer" rotation (adventurelog) — 7 defects found, 13 rows closed

New runbooks/nightly-rotation.md; observations_gate.py reads every section
(R-471); target-selection.md names real paths (R-461); R-93 carries the
fact that drill-r50 is gone. Register: R-473/R-474/R-466/R-471/R-453/R-461
and v0.240.0's R-477/R-478/R-480/R-482/R-484/R-485/R-486 closed; R-481,
R-483, R-487, R-488, R-489 opened. 09 §6.1, 07 §6, CONTEXT, STATUS note.
Evidence: audits/nightly-2026-09-13-adventurelog/, audits/v0240-2026-09-13/.

documentation/architecture/09-update-architecture.md

@@ -398,6 +398,15 @@ health wait, 53 s before the hold — and wrote the never-started definition int
 The Tier-2 mirror the hold names survived only because Tier 2 is daily. `backup.Manager.isHeld` now also
 answers true for an app a guarded update is moving (`SetUpdatingCheck`).
 
+**v0.240.0 (2026-09-13, evening) — what the afternoon's proof and the first nightly rotation found, fixed.**
+Seven rows: removal with backups kept now keeps the Tier-2 RECORD, so the second-drive restore is not
+refused over an intact mirror (R-486, P1 — the disaster the second copy exists for); PostGIS/pgvector/
+TimescaleDB images are Postgres, so such apps get their logical dump (R-484); "delete backups" deletes
+the unit, the mirror(s) and the prefs (R-474/R-466); the backup card sizes them (R-485); a held
+update's sentence leaves the card with the hold (R-480); the Tier-3 lookup is one `snapshots` call
+(R-477); a unit older than the app's `deployed_at` does not count (R-478). Delivered by the floor in
+16 s / 18 s; every row proven live with a throwaway adventurelog. `audits/v0240-2026-09-13/`.
+
 **Proven live on demo-hp, 2026-09-13**, with a throwaway uptime-kuma and real catalog tag changes (each
 reverted in the same phase): A (2.3.2→2.4.0, done after health), B (`backup_max_age: 2m` → backup first),
 E (non-existent tag → pin back, container untouched), F (`alpine:3.20` → held), H (three buttons and the