Enrich build finished logs

[ghost]

We've recently added this plugin in the hopes to put together a Grafana dashboard to show average build times, failure rates and so on.

We've not had much luck so far, though, due to limitations on how much gets logged. I set about graphing build times for master, but am currently unable to exclude builds that were manually restarted by a developer from some middle-stage. If master fails running our E2E suite, we'll restart it from just that step, which results in an erroneously fast build time for any graph I might put together.

It would be possible to filter these out if we had access to the buildCause field, but this is currently only logged at the beginning of the build (and these logs don't have the duration, or result that I need).

Basically, I want to be able to run the following:

jobName: master AND result: SUCCESS AND buildCause: Branch indexing

So, I guess this is a feature request - would it be possible to repeat all the fields from the 'build started' logs in the corresponding 'build finished' ones?