chore(lib): simplify export's implementation and add polarization

[jeertmans]

Import changes made in #355.

[codecov]

Codecov Report

❌ Patch coverage is 86.66667% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 84.20%. Comparing base (e43a480) to head (ee9266f).
⚠️ Report is 48 commits behind head on main.

Files with missing lines	Patch %	Lines
differt/src/differt/plugins/deepmimo.py	86.66%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #356   +/-   ##
=======================================
  Coverage   84.19%   84.20%           
=======================================
  Files          32       32           
  Lines        3024     3032    +8     
=======================================
+ Hits         2546     2553    +7     
- Misses        478      479    +1     

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[codspeed-hq]

CodSpeed Performance Report

Merging #356 will not alter performance

_{Comparing simplify-export (ee9266f) with main (e43a480)}

Summary

✅ 10 untouched