chore: refactor AudienceResolver with Result as return

[wolf4ood]

What this PR changes/adds

refactor AudienceResolver with Result as return

Why it does that

Briefly state why the change was necessary.

Further notes

List other areas of code that have changed but are not necessarily linked to the main feature. This could be method
signature changes, package declarations, bugs that were encountered and were fixed inline, etc.

Linked Issue(s)

Closes #4265

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.03%. Comparing base (7f20ba5) to head (45288fe).
Report is 302 commits behind head on main.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4266      +/-   ##
==========================================
+ Coverage   71.74%   75.03%   +3.28%     
==========================================
  Files         919     1046     +127     
  Lines       18457    20986    +2529     
  Branches     1037     1171     +134     
==========================================
+ Hits        13242    15746    +2504     
+ Misses       4756     4727      -29     
- Partials      459      513      +54     

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