Add whitelisting to messag field masking

[kafkaesko]

Issue submitter TODO list

• I've searched for an already existing issues here
• I'm running a supported version of the application which is listed here and the feature is not present there

Is your proposal related to a problem?

It is possible to mask fields of a message by field name.
If you have a huge number of fields (say >1000), it is not possible to mask all fields together and just exclude (whitelist) specific fields from the masking.

Describe the feature you're interested in

For messages with a huge number of fields it would be great to be able to mark all fields for masking and whitelist some of the fields that should be excluded from masking. Otherwise each single field has to be configured for masking to be able to leave some out.

Describe alternatives you've considered

At the moment this could only be done by configuring each single field of a message for being masked or unmasked.

Version you're running

0.7.1

Additional context

Thanks a lot for your great contributions!

[github-actions]

Hello there kafkaesko! 👋

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