BLE: Add optionnal error_code CharacteristicDescriptorDiscovery::TerminationCallbackParams_t

Author: pan-

features/FEATURE_BLE/ble/CharacteristicDescriptorDiscovery.h

@@ -70,6 +70,11 @@ class CharacteristicDescriptorDiscovery {
          * status of the discovery operation
          */
         ble_error_t status;
+
+        /**
+         * error code associated with the status if any.
+         */
+        uint8_t error_code;
     };
 
     /**