Single-source package version via setuptools dynamic versioning

[anevolbap]

Summary

Single-source the package version from causalpy/version.py using setuptools dynamic versioning. Removes the duplicate version = "0.8.0" from pyproject.toml.

Fixes #155

Changes

• Replace static version in [project] with dynamic = ["version"]
• Add [tool.setuptools.dynamic] section pointing to causalpy.version.__version__

Testing

• pip install -e . resolves version correctly
• python -c "import causalpy; print(causalpy.__version__)" returns 0.8.0
• importlib.metadata.metadata('CausalPy')['Version'] returns 0.8.0
• All pre-commit hooks pass (--all-files)
• Full test suite passes (799 passed, 5 skipped)

Checklist

• No new dependencies
• Pre-commit hooks pass
• Editable install works
• Package metadata resolves correctly

[github-actions]

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[read-the-docs-community]

Documentation build overview

📚 causalpy | 🛠️ Build #32416563 | 📁 Comparing 9d13f20 against latest (1cf3387)

  🔍 Preview build  

8 files changed · ± 8 modified

± Modified

• 404.html
• index.html
• api/generated/causalpy.experiments.interrupted_time_series.InterruptedTimeSeries.get_plot_data_bayesian.html
• api/generated/causalpy.experiments.synthetic_control.SyntheticControl.get_plot_data_bayesian.html
• _modules/causalpy/experiments/diff_in_diff.html
• _modules/causalpy/experiments/interrupted_time_series.html
• _modules/causalpy/experiments/panel_regression.html
• _modules/causalpy/experiments/piecewise_its.html

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.59%. Comparing base (deb8774) to head (9d13f20).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #850      +/-   ##
==========================================
- Coverage   94.60%   94.59%   -0.02%     
==========================================
  Files          80       80              
  Lines       12764    12764              
  Branches      770      770              
==========================================
- Hits        12076    12074       -2     
- Misses        485      486       +1     
- Partials      203      204       +1     

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[anevolbap]

@drbenvincent this is ready for review. CI fully green.

Heads-up on the approach choice: the #155 thread floated flit, setuptools-scm, and bump2version. This PR sticks with the existing setuptools backend and just adds [tool.setuptools.dynamic]. Minimal change, no backend migration. Both read paths verified: causalpy.__version__ and importlib.metadata.metadata('CausalPy')['Version'] return 0.8.0. Thanks!