feat: Measure volume of transaction events (#13954)
feat: Measure volume of transaction events (#13954)

* feat: Measure volume of transaction events

* doc: Add code comment

mvaled/sentry,mvaled/sentry,beeftornado/sentry,mvaled/sentry,beeftornado/sentry,mvaled/sentry,mvaled/sentry,beeftornado/sentry,mvaled/sentry