add db info

README.md

@@ -17,8 +17,8 @@ This repository provides the **local ontology database** to be used by StructSen
 - **3,925,124 classes**
 - **2,683,756 synonyms**
 - Data storage:
-  - **SQLite** → structured ontology data  
-  - **ChromaDB** → vector embeddings for semantic retrieval
+  - **SQLite** → structured ontology data (`bioportal.db`) 
+  - **ChromaDB** → vector embeddings (see `bioportal_chroma`) for semantic retrieval 
 
 
 Vector embeddings (includes label + synonyms + alternative labels + definition) are generated using the `BAAI/bge-large-en-v1.5` model to enable high-quality semantic similarity search.