fix(vortex-firewall): Detect BIND RPZ in addition to dnsmasq

RPCD handler now checks for both:
- /etc/dnsmasq.d/vortex-firewall.conf (dnsmasq mode)
- /etc/bind/zones/rpz.vortex.zone (BIND RPZ mode)

This fixes the "0 blocked domains" display when using BIND DNS server.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

package/secubox/secubox-vortex-firewall/root/usr/libexec/rpcd/luci.vortex-firewall

@@ -12,9 +12,10 @@ SINKHOLE_IP="192.168.255.253"
 do_status() {
     json_init
 
-    # Service status
+    # Service status - check both dnsmasq and BIND configurations
     local active=0
     [ -f "/etc/dnsmasq.d/vortex-firewall.conf" ] && active=1
+    [ -f "/etc/bind/zones/rpz.vortex.zone" ] && active=1
     json_add_boolean "active" "$active"
     json_add_string "sinkhole_ip" "$SINKHOLE_IP"