fix: error caused by slash in name and OPENSSL_CONF (#171) ...

* fix: error caused by slash in name and OPENSSL_CONF

* ci(pre-commit): auto fixes from pre-commit hooks

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

fix: update data type for 'grade' field in Homework class ...

Adjust the data type of the 'grade' field in the Homework class from optional integer or string to optional float or string to ensure compatibility with potential decimal values.