[pyproject] Pin clapper; Remove pixi system-requirements (default is fine)

pixi.lock

pyproject.toml

src/mednet/scripts/classify/evaluate.py

src/mednet/scripts/classify/saliency/completeness.py

src/mednet/scripts/classify/saliency/generate.py

src/mednet/scripts/classify/saliency/interpretability.py

src/mednet/scripts/classify/saliency/view.py

src/mednet/scripts/config.py

src/mednet/scripts/detect/evaluate.py

src/mednet/scripts/experiment.py

src/mednet/scripts/predict.py

src/mednet/scripts/preprocess.py

src/mednet/scripts/segment/dump_annotations.py

src/mednet/scripts/segment/evaluate.py

src/mednet/scripts/segment/view.py

src/mednet/scripts/train.py

src/mednet/scripts/upload.py