[#2580] Link questions with cases

[pi-sigma]

Taiga: https://taiga.maykinmedia.nl/project/open-inwoner/task/2580

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 5.88235% with 16 lines in your changes missing coverage. Please review.

Project coverage is 44.21%. Comparing base (318aed7) to head (d89258c).

Files	Patch %	Lines
src/open_inwoner/openklant/clients.py	14.28%	6 Missing ⚠️
...c/open_inwoner/cms/cases/tests/test_contactform.py	0.00%	4 Missing ⚠️
src/open_inwoner/cms/cases/views/status.py	0.00%	4 Missing ⚠️
src/open_inwoner/cms/cases/tests/test_htmx.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1277      +/-   ##
===========================================
- Coverage    44.22%   44.21%   -0.02%     
===========================================
  Files          972      972              
  Lines        35571    35586      +15     
===========================================
+ Hits         15733    15734       +1     
- Misses       19838    19852      +14     

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