Monitoring log for homeassistant.components.http.security_filter entries

So I had my first homeassistant.components.http.security_filter entry today - only realised because I just happened to check the system log.

Has anyone created a sensor/integration to use this info (for example to generate notifications).

I’ve seen suggestions of using a command line sensor (Sensor for monitoring the logfile) but unless it polls frequently there is the risk of missing the occasion where there are multiple filter events in the polling period. The file sensor (https://www.home-assistant.io/integrations/file) also appears to be at risk of missing bulk updates…

An alternative seems to be to use https://www.home-assistant.io/integrations/system_log/ with fire_event=true but my fear there is the risk of too many un-needed events being generated (then again, what is the cost of an event??)

Any suggestions?