=== Scenario E — the pull fails (the catalog names a tag that does not exist) — 2026-09-13T10:11:03Z ===
--- BEFORE ---
{
 "state": "running",
 "updating": false,
 "update_phase": null,
 "update_phase_label": null,
 "update_error": null,
 "hold_reason": null,
 "pinned_images": {
  "uptime-kuma": "louislam/uptime-kuma:2.4.0"
 },
 "installed_images": {
  "uptime-kuma": {
   "ref": "louislam/uptime-kuma:2.4.0",
   "digest": "sha256:91e963bfda569ba115206e843febb446f473ab525add4e08b2b9e3beffa16985",
   "at": "2026-09-13T10:08:19Z"
  }
 },
 "catalog_images": {
  "uptime-kuma": "louislam/uptime-kuma:2.4.999"
 }
}
louislam/uptime-kuma:2.4.0 Up About a minute (healthy)
--- POST /api/stacks/uptime-kuma/update at 2026-09-13T10:11:04Z ---
HTTP 202
{"ok":true,"data":{"accepted":true,"completed":false},"message":"Frissítés elindult – az állapot a kártyán követhető"}

10:11:04 U safety-dump
10:11:06 - failed
--- AFTER 2026-09-13T10:11:06Z ---
{
 "state": "running",
 "updating": false,
 "update_phase": "failed",
 "update_phase_label": "A frissítés nem sikerült",
 "update_error": "Az új verzió letöltése nem sikerült, ezért a frissítés elmaradt. Az alkalmazás a korábbi verzióval fut tovább.",
 "hold_reason": null,
 "pinned_images": {
  "uptime-kuma": "louislam/uptime-kuma:2.4.0"
 },
 "installed_images": {
  "uptime-kuma": {
   "ref": "louislam/uptime-kuma:2.4.0",
   "digest": "sha256:91e963bfda569ba115206e843febb446f473ab525add4e08b2b9e3beffa16985",
   "at": "2026-09-13T10:08:19Z"
  }
 },
 "catalog_images": {
  "uptime-kuma": "louislam/uptime-kuma:2.4.999"
 }
}
louislam/uptime-kuma:2.4.0 Up About a minute (healthy)
--- the controller, verbatim (update + backup lines since 2026-09-13T10:11:04Z) ---
2026/09/13 10:11:04 router.go:567: [INFO] [api] update requested for stack: uptime-kuma
2026/09/13 10:11:04 update.go:278: [INFO] [stacks] update uptime-kuma: accepted — guarded update started
2026/09/13 10:11:04 update.go:701: [INFO] [stacks] update uptime-kuma: phase checking
2026/09/13 10:11:04 update.go:409: [INFO] [stacks] update uptime-kuma: precondition met — proven copy from 2026-09-13T10:09:51Z (1m0s old, limit 24h0m0s)
2026/09/13 10:11:04 update.go:701: [INFO] [stacks] update uptime-kuma: phase safety-dump
2026/09/13 10:11:04 update_guard.go:239: [INFO] [backup] update safety dump for uptime-kuma: the app has no database — nothing to copy (no-op)
2026/09/13 10:11:04 update.go:423: [INFO] [stacks] update uptime-kuma: safety dump done (0 file(s)) []
2026/09/13 10:11:04 update.go:701: [INFO] [stacks] update uptime-kuma: phase pinning
2026/09/13 10:11:04 pin.go:362: [INFO] [stacks] update uptime-kuma: pin advanced to the catalog's current definition (uptime-kuma=louislam/uptime-kuma:2.4.999)
2026/09/13 10:11:04 update.go:701: [INFO] [stacks] update uptime-kuma: phase pulling
2026/09/13 10:11:06 update.go:551: [INFO] [stacks] update uptime-kuma: pin and definition PUT BACK to the pre-update version (uptime-kuma=louislam/uptime-kuma:2.4.0)
2026/09/13 10:11:06 update.go:469: [ERROR] [stacks] update uptime-kuma: pull failed — pin and definition PUT BACK; the app was not touched. Docker said: exit code 1
2026/09/13 10:11:06 update.go:373: [ERROR] [stacks] update uptime-kuma FAILED in phase pulling after 1.411s — nothing was moved: pull failed: exit code 1
--- the stacks page card (badge / hold / phase fragments) ---
      1 Frissítés
      1 Frissítés gombot.">Frissítés elérhető 
      1 stackAction(event, 'uptime-kuma', 'restart')
      1 stackAction(event, 'uptime-kuma', 'stop')
      1 stackAction(event, 'uptime-kuma', 'update')
=== Scenario E — the pull fails (the catalog names a tag that does not exist) done ===
--- AFTER: the app untouched, the pin and definition put back ---
container: cb541381d93ef9a7a9d19f06c31e6b75d74cea70f3d11c0da8f9cd5a51cdd4fb louislam/uptime-kuma:2.4.0 started=2026-09-13T10:09:50.950051403Z
live: image: louislam/uptime-kuma:2.4.0
applied: image: louislam/uptime-kuma:2.4.0
pre-update-copies: 0
--- the pull's own error, verbatim, from the log ---
2026/09/13 10:11:06 manager.go:1394: [ERROR] [stacks] stderr: Image louislam/uptime-kuma:2.4.999 Pulling 
2026/09/13 10:11:06 update.go:551: [INFO] [stacks] update uptime-kuma: pin and definition PUT BACK to the pre-update version (uptime-kuma=louislam/uptime-kuma:2.4.0)
2026/09/13 10:11:06 update.go:469: [ERROR] [stacks] update uptime-kuma: pull failed — pin and definition PUT BACK; the app was not touched. Docker said: exit code 1
stderr: Image louislam/uptime-kuma:2.4.999 Pulling 
2026/09/13 10:11:06 update.go:373: [ERROR] [stacks] update uptime-kuma FAILED in phase pulling after 1.411s — nothing was moved: pull failed: exit code 1
stderr: Image louislam/uptime-kuma:2.4.999 Pulling 
