1. status before        -> ('200', '')
2. POST „Később"        -> 200 {"data":{"later_at":"2026-10-27 03:30"},"ok":true}

3. status after Később  -> ('200', '')
4. docker restart felhom-controller -> restarted
5. status after restart -> ('200', '')
6. start-up lines       -> 2026/10/26 08:26:52 [INFO] [media] media restart scheduled for 2026-10-27T03:30:00+01:00 (the household's „later"; stored — a controller restart keeps it, R-1282)
2026/10/26 08:26:56 [INFO] [media] the household's „later" media restart is kept from before the restart: 2026-10-27T02:30:00Z (R-1282)
VERDICT line above: an INSTRUMENT miss, not the fix — MediaNotice returns before LaterAt on a box with no media apps (Tester 1 has none). Second channel below: settings.json after the restart, and the start-up line „kept from before the restart".
Up 31 seconds (healthy)

## second channel, 08:27:34Z (docker exec, settings.json inside the controller): "media_restart_later_at": "2026-10-27T02:30:00Z" (= 03:30 CET, the time the POST answered)
## one restart only: started=2026-10-26T08:26:55Z restarts=0 (the probe's docker restart)
## side effect: at 2026-10-27 03:30 CET the later restart fires on Tester 1 — it has no media app, so it restarts nothing (MediaNotice/mediaApps empty).
