Update app.py

app.py

@@ -50,7 +50,7 @@ logging.getLogger("chromadb.telemetry.product.posthog").setLevel(logging.CRITICA
 
 # Resolve the data directory: /data when running inside HF Spaces (bucket mount),
 # ./data for local development.
-DATA_DIR = Path("/data_V3") if Path("/data_V3").is_dir() else Path("./data_V3")
+DATA_DIR = Path("/data_PDF") if Path("/data_PDF").is_dir() else Path("./data_PDF")
 
 CHROMA_PERSIST_DIR = str(DATA_DIR / "chroma_db")
 TRAIN_DOCS_DIR = Path("./train_data")