Add a way to pass secrets to the logging processor for masking them
We don't want to log any directly user associated information if possible and sanitizing all data that might end up in the logs is hard and it's easy to miss one place.
We could provide a way for external code (bundles) to register secrets and other identifiers which the logging processor could mask. Alternatively we could register regex for masking as well (though it's not easy to cover all cases with this)
Or we just let everyone register a monolog.processor and let it handle themselves... might be easier. And if that is tricky provide a logging masking helper function.