Fix: Open TOML files in binary mode as required by tomllib

[HalaAli198]

Problem

When processing pyproject.toml and poetry.lock files, sbom4python fails with:
TypeError: File must be opened in binary mode, e.g. use open('foo.toml', 'rb')

Root Cause

Python's tomllib (introduced in Python 3.11) requires TOML files to be opened in binary mode,
but the code was opening them in text mode.

Solution

Changed file opening mode from 'r' (text) to 'rb' (binary) in two locations:

• Line 650 in process_pyproject() method for pyproject.toml files
• Line 716 in process_pylock() method for poetry.lock files

Testing

Successfully tested with BentoML's pyproject.toml file that previously caused TypeError.

Test command:

sbom4python -r pyproject.toml --sbom cyclonedx --format json -o output.json

[feliwir]

We need this aswell. Currently we can't generate SPDX files for our pyproject.toml

[HalaAli198]

I think there’s a bit of a misunderstanding — the root issue is just with reading TOML files (Python’s tomllib requires binary mode). I’ve already submitted a PR with a fix for this, and it works in my testing. Once merged, it should unblock SPDX generation from pyproject.toml as well.

Could you please review it?

Thanks!