feat: Generate compound field choices max occurs

[tefra]

📒 Description

We have the choice element max occurs, but for whatever reason we didn't generate it...

Resolves #742

🔗 What I've Done

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💬 Comments

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🛫 Checklist

• Updated docs
• Added unit-tests
• Sample tests pass
• W3C tests pass

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.94%. Comparing base (e652e08) to head (cb8f3f7).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #994      +/-   ##
==========================================
- Coverage   99.94%   99.94%   -0.01%     
==========================================
  Files         117      117              
  Lines        9143     9140       -3     
  Branches     2171     2172       +1     
==========================================
- Hits         9138     9135       -3     
  Misses          4        4              
  Partials        1        1              

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