Fix: disable 'price' on 'ModelElementalData'

[greschd]

Comment out the price attribute on the ModelElementalData, as a workaround to #717.

Add a mass plot to the imported solid model example.

Closes #717.
Follow-up tasks tracked by #720.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.99%. Comparing base (3ae9d16) to head (73cef38).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #721      +/-   ##
==========================================
- Coverage   94.99%   94.99%   -0.01%     
==========================================
  Files         109      109              
  Lines        5695     5694       -1     
  Branches      322      322              
==========================================
- Hits         5410     5409       -1     
  Misses        284      284              
  Partials        1        1              

Flag	Coverage Δ
direct-launch	91.58% <ø> (-0.01%)	⬇️
minimum-deps	93.19% <ø> (-0.01%)	⬇️
python-3.10	94.25% <ø> (-0.01%)	⬇️
python-3.11	94.18% <ø> (-0.01%)	⬇️
python-3.12	94.38% <ø> (-0.01%)	⬇️
server-2024R2	90.81% <ø> (-0.01%)	⬇️
server-2025R1	94.18% <ø> (-0.01%)	⬇️
server-2025R2	94.18% <ø> (-0.01%)	⬇️
server-latest	94.80% <ø> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

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