DOCS: Add research directory description in README

README.md

@@ -109,6 +109,7 @@ graph TD
 │           └── ingestion/
 │               └── chunks.jsonl  # JSONL output from avap_chunker.py
 │
+├── research/                     # Directory containing all research done alongside its documents, results and notebooks
 └── src/                          # Shared library (used by both Docker and scripts)
     ├── config.py                 # Pydantic settings — reads all environment variables
     └── utils/