Check Repository Actions

[jaydotsee]

• Update pyproject.toml: Change Python requirement from >=3.13 to >=3.8 to match CI workflow
• Add cffi>=1.15.0 to requirements.txt: Required by PyInstaller for cryptography support
• Update CI workflow: Use 'python -m pytest' instead of 'pytest' for better compatibility

These changes resolve:

1. Python version mismatch between pyproject.toml and CI matrix
2. ModuleNotFoundError for _cffi_backend during PyInstaller build
3. Potential pytest import issues in CI environment