fix: force CPU device so ZeroGPU cannot strand the encoder

chore: detect degenerate query embeddings in retrieve

chore: log recommendation fields before rendering

chore: sync artifacts.py

merge: keep local main.py with fingerprint and build stamp

fix: restore scripts/__init__.py removed by git add -A

chore: fingerprint loaded artifacts and source at startup

Update main.py

fix: additive MMR field penalty

fix: unpin gradio and huggingface_hub, let Spaces manage SDK version

fix: add @spaces.GPU probe for ZeroGPU runtime startup check

fix: bind 0.0.0.0 on Spaces and enable request queue

fix: pin huggingface_hub<1.0 for gradio 4.x compatibility

Deploy CrossPaper: cross-field paper recommender

initial commit