Fix directory traversal bug #537
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Resolved a bug where relative paths could lead to incorrect directory access in config file loading. Improved path handling by adopting absolute paths, normalizing paths, and ensuring strict directory matching with `os.path.sep`. Upgraded error reporting with `ValueError` for clearer diagnostics.
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Summary
This PR addresses a directory traversal bug in the config file loading process and enhances path security. It resolves #481.
Key Changes