Display/GUI watchdog for the "backlight on, no picture" failure

On PoE sites the MIPI-DSI panel can lose its init on a supply dip while the
RK3566 keeps running; the UI may also hang or exit. Three layers:

- hardware watchdog: systemd RuntimeWatchdogSec=20s (system.conf.d)
- GUI: SdWatchdog pings systemd per swapped frame (WATCHDOG_USEC=30s, enabled
  by the binary so older versions run under the same unit) and writes
  run/qt.frame; buttontask.service gets Restart=always, NotifyAccess=main,
  TimeoutAbortSec=10s
- bt-displaywatch (root, buttontask-displaywatch.service): kernel DRM/DSI
  timeouts, eth link down->up (PoE dip hint), stale UI frames, restart storms
  -> panel re-init (stop UI, fb0 blank 4->0, start UI), repeated -> reboot
  (max 3/day, never during OTA); incident log in /var/log/buttontask/

Manual recovery: hold one finger 10 s in the bottom-left corner (panels are
single-touch). Delivered by OTA via bt-update sync_system; the web service
runs `bt-update sync-system` at start for devices updated by an older
bt-update.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

winDeployScripts/make-adb-bundle.ps1

@@ -48,6 +48,7 @@ $scriptsSrc = Join-Path $web 'scripts'
 $needScripts = @(
   'bt-netconfig', 'bt-netconfig-boot', 'bt-update', 'bt-service',
   'bt-settime', 'bt-reboot', 'bt-access', 'bt-brightness', 'bt-set-master',
+  'bt-displaywatch',
   'buttontask.sudoers'
 )
 foreach ($s in $needScripts) {
@@ -180,7 +181,7 @@ $fix = @()
 $fix += Get-ChildItem (Join-Path $stage 'scripts') -File
 $fix += Get-ChildItem (Join-Path $stage 'systemd')  -File
 $fix += Get-Item      (Join-Path $stage 'device-install.sh')
-$fix += @(Get-ChildItem (Join-Path $stage 'webconfig') -Recurse -File -Include 'bt-*', '*.sh', '*.service', '*.sudoers', 'override.conf*')
+$fix += @(Get-ChildItem (Join-Path $stage 'webconfig') -Recurse -File -Include 'bt-*', '*.sh', '*.service', '*.sudoers', 'override.conf*', '*.conf')
 $fix | Sort-Object FullName -Unique | ForEach-Object { ConvertTo-Lf $_.FullName }
 
 Log "пакую архив"