Rename startup related functions

include/sta/system_event.hpp

@@ -35,14 +35,14 @@ namespace sta
 	/**
 	 * @brief Signal startup system event
 	 */
-	void signalStartupCompleted();
+	void signalStartupEvent();
 
 	/**
 	 * @brief Wait for startup system event.
 	 *
 	 * Blocking while waiting
 	 */
-	void waitForStartup();
+	void waitForStartupEvent();
 } // namespace sta