fix: deprecate __version__ in __init__.py

[d0choa]

This is falling out of fashion when using modern build systems (e.g. poetry). More info here:
https://stackoverflow.com/questions/72167802/adding-version-attribute-to-python-module

[codecov-commenter]

Codecov Report

Attention: 129 lines in your changes are missing coverage. Please review.

Comparison is base (42b366c) 85.67% compared to head (0768600) 86.20%.
Report is 67 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #421      +/-   ##
==========================================
+ Coverage   85.67%   86.20%   +0.53%     
==========================================
  Files          89       95       +6     
  Lines        2101     2595     +494     
==========================================
+ Hits         1800     2237     +437     
- Misses        301      358      +57     

Files	Coverage Δ
src/airflow/dags/common_airflow.py	90.38% <100.00%> (ø)
src/airflow/dags/dag_preprocess.py	100.00% <ø> (ø)
src/airflow/dags/finngen_preprocess.py	100.00% <100.00%> (ø)
src/airflow/dags/gwas_catalog_harmonisation.py	43.47% <ø> (ø)
src/airflow/dags/gwas_curation_update.py	100.00% <100.00%> (ø)
src/otg/__init__.py	100.00% <ø> (ø)
src/otg/cli.py	91.66% <100.00%> (+21.66%)	⬆️
src/otg/common/session.py	87.50% <100.00%> (+0.32%)	⬆️
src/otg/config.py	100.00% <100.00%> (ø)
src/otg/dataset/dataset.py	91.80% <100.00%> (ø)
... and 36 more

[ireneisdoomed]

Great! Found a nice ticket in poetry about this. With info to extract the version from the package metadata using importlib.metadata