fix: enhance KNX OAM router functionality and security features

Signed-off-by: Tony <tonylu@tony-cloud.com>

components/gateway_knx/include/oam_router_runtime.h

@@ -38,6 +38,8 @@ class OamRouterRuntime {
   bool programmingMode() const;
   void setProgrammingMode(bool enabled);
   void toggleProgrammingMode();
+  bool matchesSecureSyncSerial(CemiFrame& frame) const;
+  bool matchesRecentSecureToolAccess(CemiFrame& frame) const;
   EtsMemorySnapshot snapshot() const;
 
   DeviceObject* deviceObject();
@@ -60,6 +62,8 @@ class OamRouterRuntime {
   std::string nvs_namespace_;
   CemiFrameSender sender_;
   CemiFrameSender bus_frame_sender_;
+  mutable uint16_t recent_secure_tool_source_{0xffff};
+  mutable int64_t recent_secure_tool_sync_us_{0};
 #if defined(ENABLE_BAU091A_PERSONA)
   EspIdfPlatform platform_;
   Bau091A device_;