feat(app.py): add run names to retrievers in ensemble retriever configuration for better logging and debugging

app.py

@@ -184,7 +184,11 @@ chroma_retriever = chroma_db.as_retriever(
 bm25_retriever = BM25Retriever.from_documents(combined_documents)
 bm25_retriever.k = 10
 ensemble_retriever = EnsembleRetriever(
-    retrievers=[bm25_retriever, faiss_retriever, chroma_retriever],
+    retrievers=[
+        bm25_retriever.with_config(run_name="bm25"),
+        faiss_retriever.with_config(run_name="faiss"),
+        chroma_retriever.with_config(run_name="chroma"),
+    ],
     weights=[0.4, 0.3, 0.3],
 )