Add BHCToAVS model for patient-friendly summaries

[charanw]

Contributor: Charan Williams ([email protected])

Contribution Type: New Model

Description:
Added a new clinical summarization model, BHCToAVS, which converts Brief Hospital Course (BHC) notes into patient-friendly After-Visit Summaries (AVS). The model wraps a fine-tuned Mistral-7B LoRA adapter hosted on Hugging Face and integrates with the PyHealth model API. This contribution includes the full model implementation, unit tests, documentation, and an example usage script.

Files to Review:

• pyhealth/models/bhc_to_avs.py — Main model implementation
• pyhealth/models/__init__.py — Added import for the new model
• tests/core/test_bhc_to_avs.py — Unit test for the BHCToAVS model
• docs/api/models/pyhealth.models.bhc_to_avs.rst — Sphinx documentation file
• docs/api/models.rst — Updated model index to include BHCToAVS
• examples/bhc_to_avs_example.py — Example usage demonstrating model prediction