Tighten ruff checks

[hmgaudecker]

What problem do you want to solve?

Enable

• INP001 (implicit namespace packages without init.)
• PLR2004 (Magic values used in comparison)
• PT006 (Allows only lists of tuples in parametrize, even if single argument)
• PT007 (wrong type in parametrize)
• S101 (use of asserts outside of tests)
• some more checks on individual files

[hmgaudecker]

Autoreview.

[codecov]

Codecov Report

❌ Patch coverage is 50.84746% with 29 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/ttsim/tt_dag_elements/param_objects.py	50.00%	8 Missing ⚠️
src/_gettsim/wohngeld/miete.py	50.00%	6 Missing ⚠️
src/_gettsim/einkommensteuer/abzüge/alter.py	50.00%	2 Missing ⚠️
...ttsim/interface_dag_elements/policy_environment.py	50.00%	2 Missing ⚠️
src/_gettsim/arbeitslosengeld_2/aggregations.py	0.00%	1 Missing ⚠️
src/_gettsim/elterngeld/elterngeld.py	0.00%	1 Missing ⚠️
src/_gettsim/individual_characteristics.py	0.00%	1 Missing ⚠️
src/_gettsim/kindergeld/kindergeld.py	50.00%	1 Missing ⚠️
...ttsim/sozialversicherung/pflege/beitrag/beitrag.py	0.00%	1 Missing ⚠️
.../sozialversicherung/pflege/beitrag/beitragssatz.py	0.00%	1 Missing ⚠️
... and 5 more

📢 Thoughts on this report? Let us know!