fix: address scheduled stopped LXC review feedback

scripts/lxc/apply_updates.sh

@@ -45,6 +45,7 @@
 #   6  post-update restart failed
 #   7  another ProxMenux update is already running for this CT
 #   8  started CT could not record its verification handoff identity
+#   9  scheduled run skipped because the CT was intentionally stopped
 #
 # The frontend surfaces exit code + duration in a follow-up POST to
 # /api/lxc-updates/<vmid>/applied so the notification event fires with
@@ -166,7 +167,7 @@ STATE=$(pct status "$VMID" | awk '{print $2}')
 if [[ "$STATE" != "running" && "${EXECUTION_MODE:-}" == "scheduled" ]]; then
   [[ -n "${SCHEDULED_STOPPED_MARKER:-}" ]] && printf '%s\n' "$SCHEDULED_STOPPED_MARKER"
   echo "SKIPPED: CT $VMID is stopped; a scheduled update will not start it."
-  exit 8
+  exit 9
 fi
 STARTED_BY_PROXMENUX=0
 OBSERVATION_ATTEMPTED=0