fix: handle missing dataset files without traceback (#110)#201
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Summary
Closes #110
This change converts missing dataset files during extraction into a clean CLI error instead of allowing the
FileNotFoundErrorfrom xarray/h5netcdf to surface as a traceback.It handles both places mentioned in the issue:
drop_varssetxarray.open_mfdataset()call over the full dataset path listTest plan
pytest -q tests/core/test_extract.py::TestOpenDatasetMissingFiles::test_missing_first_dataset_path_exits_cleanlypytest -q tests/core/test_extract.py::TestOpenDatasetMissingFiles tests/core/test_extract.py::TestCliExtract::test_no_config_file tests/core/test_extract.py::TestCliExtract::test_cli_extractpython -m compileall -q reshapr/core/extract.py tests/core/test_extract.py