Refactor duplicated bootstrapping logic in analysis scripts

[alfieprojectsdev]

This PR addresses the code duplication between bootstrap_v1.py and bootstrap_v2.py in the analysis/08 Bootstrapping directory.

Key Changes

1. New Utility Module: Introduced bootstrap_utils.py containing:

   • run_bootstrap_simulation: The core loop for sampling, running MATLAB scripts, and processing results.
   • plot_histogram: The shared plotting logic.
   • Lazy imports for matlab.engine to allow the code to run/test in environments where MATLAB is not installed (graceful failure or mocking).

2. Refactoring:

   • bootstrap_v1.py and bootstrap_v2.py now import bootstrap_utils and call run_bootstrap_simulation with their specific parameters (sample size, reference station data, etc.).
   • Preserved existing behavior, including the specific sys.path modification in v2.

3. Modernization:

   • Replaced df.append() (deprecated) with pd.concat().

4. Testing:

   • Added test_bootstrap.py which mocks matlab.engine and verifies that the simulation loop runs, creates expected files (PHm.txt), and processes results correctly.
   • Ensured tests pass even when matlab module is not present in the environment.

Verification

• Ran test_bootstrap.py successfully.
• Ran ruff to ensure code quality.
• Verified that bootstrap_v1.py and bootstrap_v2.py can be imported and fail gracefully when input files are missing (as expected in the test environment).

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PR created automatically by Jules for task 153735260210762914 started by @alfieprojectsdev

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