Here is a list of all enums with links to the classes they belong to:

alert_severity : kcenon::monitoring::performance_alert_event
alert_type : kcenon::monitoring::performance_alert_event
change_type : kcenon::monitoring::configuration_change_event
event_type : kcenon::monitoring::system_event
filter_type : kcenon::monitoring::metric_filter
health_status : kcenon::monitoring::health_check_event
lifecycle_state : kcenon::monitoring::component_lifecycle_event
rate_direction : kcenon::monitoring::rate_of_change_trigger
severity : kcenon::monitoring::resource_threshold_monitor::alert
state : kcenon::monitoring::state_change_event
status_code : kcenon::monitoring::trace_span