Update session_rag.py

session_rag.py

@@ -1,10 +1,13 @@
-\
 from typing import List, Tuple
 from sentence_transformers import SentenceTransformer
 import numpy as np
 import faiss
 
 class SessionRAG:
+    """
+    In-memory, per-session store for uploaded content.
+    No disk persistence to remain PHI-safe by default.
+    """
     def __init__(self, model_name="sentence-transformers/all-MiniLM-L6-v2"):
         self.model = SentenceTransformer(model_name)
         self.docs: List[Tuple[str, str]] = []