feat(audience): validate and anonymize reported audience

[ramboz]

Introducing data validation and pre-processing logic to properly validate experiment and audience checkpoints, which will be dependent on the opt-in logic, and also pre-process the reported audience to anonymize it.

Related Issues

Fix adobe/helix-rum-collector#360

[codecov]

Codecov Report

Attention: Patch coverage is 92.78351% with 7 lines in your changes missing coverage. Please review.

Project coverage is 98.79%. Comparing base (8805b49) to head (43f6233).
Report is 1 commits behind head on main.

Files	Patch %	Lines
modules/index.js	85.71%	7 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##              main     #235      +/-   ##
===========================================
- Coverage   100.00%   98.79%   -1.21%     
===========================================
  Files            6        6              
  Lines          488      583      +95     
===========================================
+ Hits           488      576      +88     
- Misses           0        7       +7     

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[trieloff]

Right direction. One note: as it is written it still assumes that you'd call sampleRUM('audience') in your application code. We'd like to change the model so that you never have to call sampleRUMwhich means we need to find a way to carry the audience membership through the DOM. One way could be to have adata-` attribute at the body. If that's present, we assume there is an audience.

[ramboz]

@trieloff I can work with the DOM. We do set a CSS class for any experiment and/or audience so code-only ones can trigger appropriately. So I could hook into that logic and skip the explicit sampleRUM call indeed

[adobe-bot]

This PR will trigger a minor release when merged.

[ramboz]

@trieloff Is there anything left before we can approve and merge this?
I see 1 failing test, but that seems related to the newly introduced language checkpoint.

[trieloff]

Good to merge when the conflicts have been resolved.

[ramboz]

@trieloff Looks like I hit the size limit with those changes. How do you want to proceed?