docs: check amount of logs in reviews

[Eliastisys]

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what/why

Small update to the log review process to potentially catch excessive amount of logs. This could as an example help us update our audit log policy instead of scaling up a bunch of Opensearch volumes.

[Eliastisys]

Is there a simple instruction that you could include on how you check the size or is that obvious in the UI?

@simonklb it's easy to see the amount in the UI but maybe worth clarifying to set the time interval bigger than retention (30 days)?