multiprocessing

[rozyczko]

This pull request introduces two main improvements: it adds support for parallel sampling in the fitting workflow via a new n_workers parameter, and it implements serialization for CalculatorFactory to enable correct state sharing across worker processes. Comprehensive tests are included for both features.

Parallel Sampling Enhancements

• Added an n_workers parameter to the sample method in easyreflectometry.fitting, enabling parallel population evaluation during sampling and updating the docstring to describe its behavior. The parameter is forwarded to the core fitter and supports sequential (None/1) and parallel (n > 1) execution.

CalculatorFactory Serialization

• Implemented __reduce__ and __state_restore__ methods in CalculatorFactory to support pickling and unpickling, preserving the active calculator state (including storage, resolution function, and magnetism) for use in worker processes.
• Added a dedicated test in tests/calculators/test_factory.py to ensure that pickled and restored CalculatorFactory instances retain their model storage and produce identical results.

Dependency Update

• Updated the easyscience dependency in pyproject.toml to use the bayesian_mp branch, which likely includes required multiprocessing support.

[github-actions]

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[codecov]

Codecov Report

❌ Patch coverage is 0% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 0.00%. Comparing base (d112d8d) to head (738117a).

Files with missing lines	Patch %	Lines
src/easyreflectometry/calculators/factory.py	0.00%	14 Missing ⚠️
src/easyreflectometry/calculators/wrapper_base.py	0.00%	6 Missing ⚠️
src/easyreflectometry/fitting.py	0.00%	6 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           bayesian    #355   +/-   ##
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  Coverage      0.00%   0.00%           
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  Files            42      42           
  Lines          2871    2896   +25     
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- Misses         2871    2896   +25     

Flag	Coverage Δ
integration	0.00% <0.00%> (ø)
unittests	0.00% <0.00%> (ø)

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Files with missing lines	Coverage Δ
src/easyreflectometry/calculators/wrapper_base.py	0.00% <0.00%> (ø)
src/easyreflectometry/fitting.py	0.00% <0.00%> (ø)
src/easyreflectometry/calculators/factory.py	0.00% <0.00%> (ø)

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