finalwalk teardown complete; R-244 filed; session report

All five layers gone, each verified with a positive control that must
survive and does:
  VM 324 + 4 disks   -> absent (VM 300 drill-r50 remains)
  hub: 13 tables at 0, incl. BOTH escrow tables (demo-felhom/demo-hp/peti remain)
  Storage Box u629488-sub4 -> gone (sub1/2/3 remain)
  ep0 PBS ns finalwalk     -> gone (demo-felhom, demo-hp remain)
  WireGuard 10.77.0.5      -> gone from the LIVE wg show on ep0, not just
                              the hub DB (.2/.3/.4/.250 remain)
14.06 GiB reclaimed against 15 G measured before deletion.

R shredded with a planted-copy control: plant -> search finds both ->
shred -> the same search finds 0. The zero was not believed until the
instrument was proven.

R-244 (NEW): a FULL census after the cascade logged COMPLETE full teardown
found 61 rows still matching finalwalk. Four sources are deliberate
provenance; the fifth, app_log_issues (29 rows), is NOT covered by the
residue purge - and it is systematic: c11 40, rewalk 20, part4 24 still
present from the 2026-08-06 teardown, whose ledger recorded zero
occurrences. That claim used a narrower query than a census and does not
hold; the correction is recorded in both the prior ledger and the register
rather than the measurement quietly redone.

No secret material is involved. The table is a fleet-wide aggregate: 12 of
the 29 rows are finalwalk-only orphans, 17 are shared with LIVE customers
and must be de-referenced, not deleted - very likely why the leg was never
written. Not fixed; a cascade change needs its own red-proof.

Lesson, and it is the reusable part: a per-table absence query is not a
census.

documentation/backlog/OPEN-ITEMS.md

@@ -172,6 +172,8 @@ the fault was real. Full observables: `tests/campaign11-evidence-2026-08-05/jour
 | **R-242** | **A controller release that changes customer-visible behaviour is not delivered until a golden carries it — and nothing enforces that.** R-239 is the symptom; this is the mechanism, recorded **2026-08-07** and deliberately **NOT built** (the task that found it scoped it as a record-only item). **Two releases went out without a golden and the gap was invisible until a walk measured it from the customer's side**: v0.204.0 (R-237) and v0.205.0 (R-234) were written, tested, pushed, and CHANGELOG'd, and every one of those steps passed while a machine installed that night received neither. The register said CLOSED; the fleet said otherwise. **Nothing in the release path knows a golden exists.** The version bump, the image push, the CHANGELOG entry and the register closure are all repo-local; the manifest's `golden_version` is edited by a separate operator act, in a different repo, with no link back. **Proposed shapes, cheapest first — the choice is the operator's and is not taken here.** (a) **A release-path checklist step** — one line in the controller's end-of-session checklist: *a release that changes customer-visible behaviour is not finished until a golden carries it or a register row says why not.* Costs nothing, catches nothing mechanically. (b) **A gate in `repo_gates.py`** comparing the manifest's `golden_version` against the newest released controller and FAILING (or warning) past a tolerance of one minor. Mechanical, runs on every push, and would have fired the morning after v0.204.0. (c) **A hub-side checker** — the hub already knows every box's running controller version from `/hosts` and the vouched golden from the manifest; a periodic comparison against the newest published image would catch drift the repo cannot see, including a vouch that was made and then rolled back. **Earliest catch: (b).** It fires on the push that creates the gap, before any box is installed, and it needs no live fleet. **(c) catches strictly more but only after boxes exist.** (a) is worth doing regardless because it is free. **Not built. No gate was written this session.** | **READY — recorded, not built** — owner Viktor |
 | **R-243** | **A box in the R-241 state silently stops backing up off-site, and NO ALARM OF ANY KIND FIRES.** Found by the R-241 spike (2026-08-07) as a by-product; **not part of the walk's finding and not previously filed.** The R-241 state is self-locking in a second, worse way than the recovery-journey dead end: `escrow_state` is stuck `pending` forever (the auto-confirm flips only on a hash match, and the hash cannot match a key the box minted itself), and `runOffboxBackup` returns at the escrow gate (`offbox.go:743`) before touching anything. **So off-site backups never run again — and the hub never notices.** All three signals that could catch it are excluded, each for its own individually-correct reason, verified in the hub this session: `offsite_stale` — `isStale` (`monitor/offsite.go:135`) returns false unless `EscrowState == "escrowed"`, and its own comment reads *"Pending/disabled = normal onboarding, never stale"*, so the box is classified as **still being set up, forever**; `offsite_delivery_stuck` — `monitor/offsite_delivery.go:91` skips the `applied` shape, and delivery genuinely IS applied (the credential was consumed and the target is in every report); `backup_failed` — never fires, because nothing fails: the run returns `nil` before it starts. **Three correct exclusions leaving one state unobserved.** This is the same class as the workspace `CLAUDE.md` "presence is not success" rule, one level up: **the absence of a failure is being read as the presence of a working tier.** **Partly subsumed by R-241's fix** — a box that recovers leaves this state — but **not for a box that does not**, and the alarm gap is what makes "does not" survivable indefinitely. **Not fixed; no code written.** | **READY** — owner Viktor |
 
+| **R-244** | **The customer DELETE cascade leaves `app_log_issues` behind, and it is systematic across every venue ever torn down.** Found **2026-08-07** while verifying the `finalwalk` teardown with a **full census** (every table, every column) rather than a per-table query. After a cascade that logged `COMPLETE … full teardown`, **61 rows still matched `finalwalk`**. Four of the five sources are **deliberate and correct** — the cascade's own header states *"Provenance/events are NEVER wiped — audit outlives every tier"*: `events` 16, `notification_log` 14, `host_deletions` 1, `customer_resets` 1. **The fifth is a gap:** `app_log_issues` 29 rows, which the residue purge does not touch (its logged leg covers `reports`/`app_telemetry`/`app_log_tails`/`log_tail_requests`/`notif_prefs`/`selfbind_tokens`/`appliance_registrations` — not this table). **It is not a `finalwalk` quirk:** rows still reference **`c11` 40, `rewalk` 20, `part4` 24** — all three torn down 2026-08-06, whose ledger recorded *"0 occurrences"*. **That prior claim was measured with a narrower query and does not survive a full census; the correction is recorded rather than the measurement quietly redone.** **Why it was probably never written, established rather than assumed:** the table is a **fleet-wide aggregate** keyed on `app_name`+`fingerprint` with an `affected_customers` JSON list — of the 29 `finalwalk` rows, **12 reference only `finalwalk`** (orphans, safely deletable) and **17 are shared with LIVE customers** (`demo-felhom`, `peti-felhom`, …) and **must not be deleted, only de-referenced.** A naive `DELETE … WHERE customer LIKE` would destroy a live customer's issue history — which is very likely why the leg does not exist, and is the reason this is not a one-line fix. **Severity is LOW and stated plainly: no secret material is involved** — app name, fingerprint, message text, counts, timestamps. What survives is a deleted customer's *identifier* inside an aggregate row. **Proposed shape:** a residue leg that (a) removes the customer id from `affected_customers`/`context_customer`, and (b) deletes rows whose `affected_customers` becomes empty; plus a one-off sweep for the four already-torn-down venues. **The general lesson is the reusable part:** *a per-table absence query is not a census.* The teardown verification is now a full-schema sweep, and that is what found this. **Not fixed** — a cascade change needs its own red-proof and this session was scoped as a spike plus two operations. Evidence: `tests/teardown-finalwalk-2026-08-07.md`. | **READY** — owner Viktor |
+
 **Recorded against existing rows by Phase 2:**
 
 - **R-216 — §4.1 is now MEASURED, not deduced.** The previous session could only offer two absences.