docs: DIAGNOSE immich offsite restore — findings + ROADMAP R-43/R-44

Viktor deleted 11 immich photos to test offsite restore; both place runs
merged 0 files and flashed success. Two-layered root cause:

- A UI delete means TRASH, not deletion — no file left the disk, so there
  was genuinely nothing missing to restore. The test proved nothing.
- A valid test would also have failed: no offsite path loads a database.
  All three buttons are file-only (offbox_restore.go:171-232, :346-421).
  Files return; the library stays empty. The only DB replay is
  RestoreFromRecoveryUnit, reachable solely from the LOCAL restore panel.

Compounding: the manual push never refreshes dumps (offbox_handlers.go:
203-227) — today's unit dump is from 02:30 and probes to asset:0 / user:0 /
album:0, predating both the admin user and the photos. Had a full restore
loaded it, it would have written an empty DB over the live one, destroying
the trashed rows that were the only surviving recovery path.

Answer to "can a customer trust same-day offsite?" for a DB-indexed app:
no — files come back, content does not.

No product code changed. Photos left in trash (recovery not wanted).
Capability map: customer-restore row stays MISSING by finding, not by
absence of attempt; offsite-restore row flagged scope-contested pending
a ruling on whether CAMPAIGN-6D exercised the DB half.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01P9Nn14TWGzKoqAJAiVwC2s

documentation/architecture/00-capability-map.md

@@ -58,13 +58,13 @@
 | Nightly DB dumps (postgres/mariadb autodiscovery), atomic writes | controller v0.118 | **PROVEN-LIVE** | `CAMPAIGN-2` T-BAK-FULL (pg+mariadb autodiscovered); atomicity `CAMPAIGN-6B` P4 + `CAMPAIGN-6E` B1/B2 (SIGKILL mid-write → only `.tar.tmp` touched, last-good byte-unchanged); DB restore `CAMPAIGN-6D` P-FAB | (Cited `CAMPAIGN-3` F7 is the *finding* of non-atomic writes, and T-RST-DB was auth-hollow — corrected to the 6B/6E fix-proofs.) T-6E-1 dir-fsync asymmetry (LOW) → R-10 |
 | Tier-2 secondary-drive copy: class-driven legs, v2 relpath layout, NAS-target exclusion, safe-remove boundary | controller v0.135 | **PROVEN-LIVE** | `CAMPAIGN-6E-2026-07-15` (P-TIER2 deep-4 PASS), `CAMPAIGN-6C` | |
 | Offsite (restic → Hetzner Storage Box): mandatory class only, raw-data quota, enlargement gate, retention regrouping | controller v0.134, agent, hub | **PROVEN-LIVE** | `CAMPAIGN-6D-2026-07-15` (mandatory-only P-IMMICH; enlargement gate fired at real 50GiB quota P3-DELIVERY); `VALIDATION-offbox-storagebox-2026-07-09` (byte-perfect round-trip) | Raw-data quota (SP-1) + retention regrouping (SP-2) are `SPIKE-restic-snapshot-shape` **dry-run** verdicts — mechanism validated, not fired in a live product run; only the enlargement gate is live-fired. **Reinstall-continuity (controller v0.142.0, 2026-07-17):** a recreated data volume that orphaned the repo (new passphrase can't open the old keys) is now CLASSIFIED (`wrong password or no key found`) → explicit ORPHANED card + event (not nightly-spam) + a move-aside (never-delete) reset (unclaimed auto / claimed confirm), instead of a raw nightly restic error. Fake-based scenarios + red-proofs. **The live leg FIRED on its own during the 2026-07-18 rehearsal** (`tests/VALIDATION-n100-rehearsal-2026-07-18.md`, S7): after a RESET + re-enable, the first offsite run hit the previous lifecycle's ciphertext and the guard **classified it, pushed `offbox_repo_orphaned`, skipped the run and showed the card (16:58:14)** rather than nightly-spamming a raw restic error; the operator-confirmed reset then **moved the repo aside (never deleted) to `.orphaned-20260718` and re-initialised (16:59:26→16:59:32)**, and the next run produced 2 snapshots / 48.717 MiB. The guard behaved exactly as designed — **the finding is that it had to fire at all** (R-32: RESET destroys custody, so the ciphertext it leaves behind is dead by design and should be purged, while the move-aside guard stays correct for reinstall-WITHOUT-RESET). `DIAGNOSE-offbox-repo-orphaned-2026-07-17` |
-| Offsite restore: local-preferred scratch, unit-only default, full two-step, missing-only place-to-live | controller v0.134/134.1/135 | **PROVEN-LIVE** | `CAMPAIGN-6D` accept legs (immich end-to-end from offsite alone) | |
+| Offsite restore: local-preferred scratch, unit-only default, full two-step, missing-only place-to-live | controller v0.134/134.1/135 | **PROVEN-LIVE** — *scope contested, ruling needed* | `CAMPAIGN-6D` accept legs (immich end-to-end from offsite alone) | **2026-07-19:** `audits/DIAG-immich-restore-2026-07-19.md` finds **no offsite path loads a DB dump** — all three buttons are file-only (R-43). The mechanics in this row's title are each proven; the phrase "**immich end-to-end from offsite alone**" is what is contested, since a DB-indexed app cannot be reconstituted by any offsite action. Status left as-is pending Viktor's read of whether 6D's accept leg actually exercised the DB half or only the file half |
 | Manual `.fab` export/import: class-scoped capture, browser up/download, tunnel-proof chunking | controller v0.125/128/130/136 | **PROVEN-LIVE** | `CAMPAIGN-6D` P-FAB / Accept #1 (1.7 GB full circle, byte-identical, app boots); chunking `CAMPAIGN-6B` P2 (100 MiB via real CF edge, 120 MiB→413) | Chunking proven at the real CF edge via `curl --resolve`; the **rendered browser file-picker** upload leg is still Viktor's open full-circle test (6C ran it NOT-RUN). C6B-F1 was the 6B *finding*; fix verified in 6D |
 | Guest-loss DR: PBS restore with full-fidelity layout from archive, restore-test verification | agent v0.75/0.76, PBS | **PROVEN-LIVE** | `CAMPAIGN-2` T-P9-DESTROY-RESTORE (whole-guest `pct restore` of 9201 → running+healthy) + T-PBS-VERIFY (`verify_state: ok`, 13 snapshots); `DRILL-GL6-2026-07-08` Phase 0d (restore-test `mount_parity: ok`) | (Cited `VALIDATION-newbox-restore` is offbox **restic** file-restore, wrong tier — corrected.) Real **offsite** guest-loss round-trip still R1-blocked → S5 DR drill |
 | PBS-DR secret self-heal on reused-peer re-provision | hub v0.56 | **IMPLEMENTED** | hub v0.56.0 (`pbsdrheal/reconciler.go`, `RestageHostPBSSecret`, all §10 red-proofs); `SPIKE-pbsdr-selfheal-2026-07-15` (root cause) | Reconciler is **scoped to one host** (`PBSDRHEAL_ONLY_HOST`), not fleet-wide; already fired live hands-free on drill qm300 (07-15) — real-customer firing + fleet-wide widening pending |
 | Crash/power-loss mid-backup/mid-migration → self-heal on next run | controller, agent | **PROVEN-LIVE** | `CAMPAIGN-6D` P5-REST (SIGKILL mid-offbox → auto-restart ~15s, run marked failed not false-success, no stale lock); `CAMPAIGN-6E` B1-B3 | (Cited `CAMPAIGN-2` T-RBT-* legs were empty / auth-hollow — corrected.) Live mid-**migration** crash→self-heal is the weakest sub-claim (P5-REST is mid-backup) |
 | Soft-quota: usage bar, pre-push enlargement block, customer notification | controller v0.109/134, hub v0.41/55 | **PROVEN-LIVE** | 6D/6E; hub OffsiteChecker | |
-| **A customer (not the operator) performs a restore via UI alone** | all | **MISSING** (as evidence) | — | Alpha will produce this; script it into R-3 |
+| **A customer (not the operator) performs a restore via UI alone** | all | **MISSING** (as evidence) | — | Alpha will produce this; script it into R-3. **2026-07-19:** the C6 evidence attempt ran and found a **product gap instead of evidence** — `audits/DIAG-immich-restore-2026-07-19.md`. A customer-driven UI restore of a DB-indexed app cannot currently succeed (R-43 file-only restore, R-44 stale dump), so this row cannot flip until those close. Row stays MISSING **by finding, not by absence of attempt** — the rehearsal system working, not failing. Method note for R-3's script: deleting in an app's own UI usually means *trash*, not deletion, so a drill written that way merges 0 files, flashes success and proves nothing — a real drill must empty the trash **and** verify the app's *content*, not the file count |
 
 ## D. Storage & devices