feat: add chunk part with answer

rag_demo/rag/source_annotator.py

@@ -31,7 +31,7 @@ class SourceAnnotator:
             # Could also use a score cut-off instead of max()
             max_score = max(scores, key=lambda x: x["score"])
 
-            annotated_response += f"{sentence} [filename: {max_score['filename']}, chunk_id: {max_score['chunk_id']}] "
+            annotated_response += f"{sentence} [filename: {max_score['filename']}, chunk_id: {max_score['chunk_id']}, chunk_part_with_answer: {max_score['answer']}] "
 
         return annotated_response