fix: Derived element json serialization

[tefra]

📒 Description

This broke with the new more strict typing analyze process, let's add it back

Resolves #xxxx

🔗 What I've Done

Write a description of the steps taken to resolve the issue

💬 Comments

A place to write any comments to the reviewer.

🛫 Checklist

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

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

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

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (874a6d2) to head (1254135).

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #1035   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          115       115           
  Lines         9265      9267    +2     
  Branches      2190      2191    +1     
=========================================
+ Hits          9265      9267    +2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.