TDD: extremely poor performance with lots of diffs

[KaelWD]

/api/events includes full metadata including diffClusters for every failing test on every update event, resulting in potentially gigabytes of data being streamed to the page while tests are running

[Robdel12]

This should be fixed in v0.29.2! And I'll keep making more improvements here.

[KaelWD]

Much better, thanks. Every reportData event sending the full data array again instead of just new entries is still not very efficient but at least it's in the 10s of megabytes now and the page doesn't freeze.
There's also multiple connections being made to /api/events, I don't know what the best way to do this in react is but useReportData should be some sort of singleton so the state can be shared between the four places it's used.