fix(axparameter): register callbacks with fully qualified parameter names

Ensure callback registration uses the same fully qualified path format
("root." APP_NAME ".{param}") that the callback handler expects when
parsing parameter names.

Closes #440

Author: lucky-rydar

axparameter/app/axparameter.c

@@ -191,11 +191,19 @@ int main(void) {
     g_free(serial_number);
 
     // Act on changes to IsCustomized as soon as they happen.
-    if (!ax_parameter_register_callback(handle, "IsCustomized", parameter_changed, handle, &error))
+    if (!ax_parameter_register_callback(handle,
+                                        "root." APP_NAME ".IsCustomized",
+                                        parameter_changed,
+                                        handle,
+                                        &error))
         panic("%s", error->message);
 
     // Register the same callback for CustomValue, even though that parameter does not exist yet!
-    if (!ax_parameter_register_callback(handle, "CustomValue", parameter_changed, handle, &error))
+    if (!ax_parameter_register_callback(handle,
+                                        "root." APP_NAME ".CustomValue",
+                                        parameter_changed,
+                                        handle,
+                                        &error))
         panic("%s", error->message);
 
     // Start listening to callbacks by launching a GLib main loop.