Use gala v1.11

[TomWagg]

This pull request introduces several important improvements and new features to the cogsworth package, most notably adding support for the latest version of the gala library, enhancing reproducibility by tracking software versions in saved population files, and fixing issues with column decoding during population loading. The default Milky Way potential has been updated throughout the codebase to align with the new gala API. Below are the most significant changes:

Support for Latest Gala and Updated Galactic Potential Defaults:

• Updated the minimum required version of gala to 1.11.0 in setup.cfg, enabling support for time-evolving potentials and new MilkyWayPotential interfaces.
• Replaced all uses of gp.MilkyWayPotential2022() with gp.MilkyWayPotential(version='v2') in both core code and tests to match the updated gala API. [1] [2] [3] [4] [5] [6]

Improved Reproducibility and Version Tracking:

• When saving a population, the versions of cogsworth, COSMIC, and gala used are now stored as attributes in the output file. When loading, the code checks for mismatches and issues a warning if the versions differ, helping users track software provenance and avoid compatibility issues. [1] [2] [3]
• Added a test to ensure that version mismatch warnings are triggered appropriately when loading population files.

Bug Fixes and Minor Improvements:

• Fixed an issue where bpp_columns and bcm_columns were not properly decoded from byte strings to regular strings when loading population files, preventing downstream errors.
• Changed the default binary fraction (binfrac) in the BSE settings from 0.5 to 1.0 in utils.py.

Documentation and Versioning:

• Updated the changelog to document all the above changes and bumped the package version to 3.5.0. [1] [2]

Gala release notes found here: https://github.com/adrn/gala/releases/tag/v1.11.0

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (6d0a6c9) to head (a7cb0de).
⚠️ Report is 19 commits behind head on main.

Additional details and impacted files

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  Coverage   100.00%   100.00%           
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  Files           15        15           
  Lines         2055      2068   +13     
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+ Hits          2055      2068   +13     

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