Update vectordb_utils.py

vectordb_utils.py

@@ -4,6 +4,7 @@ from qdrant_client import QdrantClient
 from qdrant_client.models import VectorParams, Distance, PointStruct
 from sentence_transformers import SentenceTransformer
 import uuid
+import os
 cache_dir = os.environ.get("MODEL_CACHE_DIR", "/app/cache")  # Fallback to /app/cache
 os.makedirs(cache_dir, exist_ok=True)
 encoder =SentenceTransformer("all-MiniLM-L6-v2", cache_folder=cache_dir)