uptime-kuma: 2.4.0 -> 2.5.5, its first ladder step, both venues proven (R-462)

A new front-door fixture: the app's own socket.io messages over plain HTTP polling (setup, login,
addStatusPage), read back through its public /api/status-page/<slug>, with an absent-slug control.
Bench 9401 (harness v4, swap 0): proven, 10-min watch 0 kills (anon peak 43.3 %); the abort starts
and serves. Box 9202: done in 33.9 s through the setup gate, the status page read back.
Written by upgrade-test.py --write-ladder.

Evidence: felhom.eu/documentation/audits/more-night-apps-2026-09-30/

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

templates/uptime-kuma/.felhom.yml

@@ -10,7 +10,7 @@ subdomain: "status"
 slug: "uptime-kuma"
 # catalog_since: the date THIS repo last changed this app's pinned images. Any commit that
 # changes an image: line must set this to the same day (see CLAUDE.md).
-catalog_since: "2026-09-21"
+catalog_since: "2026-09-30"
 
 # --- Resource hints (displayed on deploy screen) ---
 resources:
@@ -95,3 +95,9 @@ i18n:
       - env_var: SUBDOMAIN
         label: 'Subdomain'
         description: 'The subdomain this app answers on'
+
+# 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": {"uptime-kuma": "louislam/uptime-kuma:2.4.0"}, "to": {"uptime-kuma": "louislam/uptime-kuma:2.5.5"}, "digest": {"uptime-kuma": "sha256:c74379ac4509ce2d2c2633f509e67003ee2e45b6e995c5e43fc101f45a0e1fbe"}, "verdict": "proven", "tested_at": "2026-09-30T16:50:40Z", "harness_version": 4, "evidence": "felhom.eu/documentation/audits/more-night-apps-2026-09-30/bench/apps/uptime-kuma/bench/evidence/MV-uptime-kuma/verdict.json", "box_evidence": "felhom.eu/documentation/audits/more-night-apps-2026-09-30/box/uptime-kuma/step.txt", "memory_peak_pct": 43.3, "marks": {"files_may_change": false, "needs_person": null, "memory_tight": false}, "memory_basis": "anon", "memory_cgroup_peak_pct": 49.7}

templates/uptime-kuma/docker-compose.yml

@@ -8,7 +8,7 @@
 
 services:
   uptime-kuma:
-    image: louislam/uptime-kuma:2.4.0
+    image: louislam/uptime-kuma:2.5.5
     container_name: uptime-kuma
     restart: unless-stopped
     environment: