test record: an image move must carry its proof (09 decision 13, part 4)

update_ladder: in .felhom.yml, one JSON entry per line (spiked live on
controller v0.266.0 and v0.267.0 first). Two gates: check-test-record.py
(static, CI too) and check-test-record-move.py (history + registry for
moved refs only). 16 decoys, 3 red-proofs. The ONLY writer is
upgrade-test.py --write-ladder (bench AND box proven, digests resolved).
Harness v3: box fixtures on the bench, files_may_change.
Backfill: the 21 moves of 2026-09-22, 21 proven from their records.
No image: line moved.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

templates/vikunja/.felhom.yml

@@ -99,3 +99,9 @@ i18n:
         description: 'The subdomain this app answers on'
       - env_var: VIKUNJA_SERVICE_JWTSECRET
         label: 'JWT encryption key'
+
+# update_ladder — the test record: one tested step per line, oldest first (JSON flow mappings,
+# `09-update-architecture.md` §6.4 part 4). WRITTEN BY scripts/upgrade-test.py, never by hand;
+# gated by scripts/check-test-record.py. An image: move without a proven entry here is refused.
+update_ladder:
+  - {"from": {"vikunja": "vikunja/vikunja:2.3.0"}, "to": {"vikunja": "vikunja/vikunja:2.6.0"}, "digest": {"vikunja": "sha256:417ada6f94e81f0267aa2f007d0a811fc82d38dd2aa58351e3ea520ca01c2ea5"}, "verdict": "proven", "tested_at": "2026-09-21T19:25:26.344387+00:00", "harness_version": 1, "evidence": "felhom.eu/documentation/audits/update-night-2026-09-21/apps/vikunja/verdict.json", "memory_peak_pct": null, "marks": {"files_may_change": false, "needs_person": null, "memory_tight": false}, "backfilled": "2026-09-23", "note": "backfilled from catalog commit 22f598b; box walk only (harness v1, no memory watch); digest = what the registry served on 2026-09-23, not a measurement of the tested image"}