Update hedis_engine.py

hedis_engine.py

@@ -18,7 +18,7 @@ class HedisComplianceEngine:
         @tool("patient_chart_search")
         def patient_chart_search(query: str) -> str:
             """Return top patient chart passages relevant to the query."""
-            results = self.vectordb.similarity_search(query, k=20)
+            results = self.vectordb.similarity_search(query, k=15)
             return "\n".join([res.page_content for res in results])
 
         # 1) HEDIS measure expert (external knowledge via model)