FD: add dedicated topic to log more internal states

log imbalanced propeller check metric

add failure_detector_status message

src/modules/logger/logged_topics.cpp

@@ -60,6 +60,7 @@ void LoggedTopics::add_default_topics()
 	add_topic("commander_state");
 	add_topic("cpuload");
 	add_topic("esc_status", 250);
+	add_topic("failure_detector_status", 100);
 	add_topic("follow_target", 500);
 	add_topic("generator_status");
 	add_topic("heater_status");