Add stability hardening and self-heal recovery

iso/builder/config/hooks/normal/9000-bee-setup.hook.chroot

@@ -30,6 +30,7 @@ systemctl enable bee-preflight.service
 systemctl enable bee-audit.service
 systemctl enable bee-web.service
 systemctl enable bee-sshsetup.service
+systemctl enable bee-selfheal.timer
 systemctl enable ssh.service
 systemctl enable lightdm.service 2>/dev/null || true
 systemctl enable qemu-guest-agent.service 2>/dev/null || true
@@ -58,6 +59,7 @@ chmod +x /usr/local/bin/bee-sshsetup   2>/dev/null || true
 chmod +x /usr/local/bin/bee-smoketest  2>/dev/null || true
 chmod +x /usr/local/bin/bee            2>/dev/null || true
 chmod +x /usr/local/bin/bee-log-run    2>/dev/null || true
+chmod +x /usr/local/bin/bee-selfheal   2>/dev/null || true
 if [ "$GPU_VENDOR" = "nvidia" ]; then
     chmod +x /usr/local/bin/bee-nvidia-load 2>/dev/null || true
     chmod +x /usr/local/bin/bee-gpu-burn 2>/dev/null || true

iso/builder/smoketest.sh

@@ -171,6 +171,12 @@ for svc in bee-nvidia bee-network bee-preflight bee-audit bee-web; do
     fi
 done
 
+if systemctl is-active --quiet bee-selfheal.timer 2>/dev/null; then
+    ok "timer active: bee-selfheal.timer"
+else
+    fail "timer NOT active: bee-selfheal.timer"
+fi
+
 echo ""
 echo "-- runtime health --"
 if [ -f /appdata/bee/export/runtime-health.json ] && [ -s /appdata/bee/export/runtime-health.json ]; then