fix: SHAP explain - torch import, reduce samples, fix visualizer scale

fix: update model architecture, features, config to match trained model

Upload routes/health.py with huggingface_hub

Upload routes/models.py with huggingface_hub

Upload routes/agent.py with huggingface_hub

Upload routes/explain.py with huggingface_hub

Upload routes/history.py with huggingface_hub

Upload routes/prediction.py with huggingface_hub

Delete routes/prediction.py with huggingface_hub

Delete routes/models.py with huggingface_hub

Delete routes/history.py with huggingface_hub

Delete routes/health.py with huggingface_hub

Delete routes/explain.py with huggingface_hub

Delete routes/agent.py with huggingface_hub

Initial deploy: ToxiPredict API backend