add NTP time synchronization module

src/utun_instance.c

@@ -369,6 +369,9 @@ void utun_instance_destroy(struct UTUN_INSTANCE *instance) {
     // Stop running if not already
     instance->running = 0;
 
+    // Cancel NTP timer
+    ntp_time_destroy(instance);
+
     // Shutdown message transport server
     if (instance->msg_t) {
         DEBUG_INFO(DEBUG_CATEGORY_GENERAL, "Shutting down message transport server");
@@ -608,7 +611,12 @@ int utun_instance_init(struct UTUN_INSTANCE *instance) {
     
     // Start the main loop
     instance->running = 1;
-    
+
+    // Initialize NTP time sync (non-fatal if fails)
+    if (ntp_time_init(instance) != 0) {
+        DEBUG_WARN(DEBUG_CATEGORY_GENERAL, "NTP time sync init failed (non-fatal)");
+    }
+
     DEBUG_DEBUG(DEBUG_CATEGORY_ETCP, "Connections initialized successfully");
     return 0;
 }