The core idea is simple: fetch structured inputs from multiple sources (RIS, modalities, AI services),
merge them into a single input_json, then run doctor-authored Python scripts that
populate a result dictionary. Each key in result becomes a report snippet placeholder.
input_json (merged data from services).result (a dict).*.py scripts are concatenated in filename order and executed as one program.<ext:CuraForge.impression_snippet>
result.