feat(ble): Delay epic con open ind until epicardium is done

This delays the connection open event until epicardium is done discovering and configuring services on the central. This prevents pycardium from interfering with that process.

epicardium/ble/ble_api.h

@@ -48,6 +48,7 @@ void ble_epic_att_api_free_att_write_data(struct epic_att_write *w);
 void ble_epic_ble_api_trigger_event(enum epic_ble_event_type type, void *data);
 void ble_epic_ble_api_init(void);
 void ble_epic_dm_api_event(dmEvt_t *dm_event);
+void ble_epic_disc_cfg_complete(void);
 
 void ble_adv_init(void);
 void ble_adv_setup(void);