Polish and incorporate cont state in utility functions

[MaxBlesch]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 97.87234% with 1 line in your changes missing coverage. Please review.

Project coverage is 95.74%. Comparing base (3799208) to head (3f8bd40).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...els/cons_ret_model_with_exp/state_space_objects.py	88.88%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #130      +/-   ##
==========================================
- Coverage   96.47%   95.74%   -0.73%     
==========================================
  Files          33       32       -1     
  Lines        1134     1128       -6     
==========================================
- Hits         1094     1080      -14     
- Misses         40       48       +8     

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[segsell]

Good refactoring, thank you!