Pydantic for Aeroval setupclasses.py

[lewisblake]

Playing with pydantic to see what structure in pyaerocom/aeroval/setupclasses.py can be simplified / flattened.

[lewisblake]

Designed to close #1031

[codecov]

Codecov Report

Attention: Patch coverage is 95.23810% with 10 lines in your changes missing coverage. Please review.

Project coverage is 79.15%. Comparing base (5ff89df) to head (3d1e1c4).
Report is 1308 commits behind head on main-dev.

Files with missing lines	Patch %	Lines
pyaerocom/aeroval/setupclasses.py	94.35%	10 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           main-dev    #1017      +/-   ##
============================================
- Coverage     79.27%   79.15%   -0.12%     
============================================
  Files           109      109              
  Lines         19023    19080      +57     
============================================
+ Hits          15080    15103      +23     
- Misses         3943     3977      +34     

Flag	Coverage Δ
unittests	79.15% <95.23%> (-0.12%)	⬇️

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[lewisblake]

Marking this as ready for review but I would really appreciate it if I could get some feedback on some of the implementation details. Starting lines 308 and 336 in setupclasses.py there are some comments which explain in more detail what I would like feedback on. Also happy to go through this in person @avaldebe after you have chance to look at it if you have any suggestions.

[avaldebe]

mostly minor changes. The classes still mix data and behavior, but changing that is out of the scope of this PR.

[avaldebe]

please make sure that typing_extensions is an explicit dependency.
Accordig to the typing_extensions changelog any version after 4.0.1 should work.

On pyproject.toml you'll need to add the following line

dependencies = [
[...]
    # python < 3.11
    'tomli>=2.0.1; python_version < "3.11"',
    'importlib-resources>=5.10; python_version < "3.11"',    
+   'typing-extensions>=4.0.1; python_version < "3.11"',

The equivalent line on pyaerocom_env.yml would be

dependencies:
[...]
## python < 3.11
  - tomli >=2.0.1
  - importlib-resources >=5.10
+ - typing-extensions >=4.0.1

[avaldebe]

✅