Fix vector store creation method to use correct initialization

src/indexing/vectore_store.py

@@ -7,7 +7,7 @@ class VectorStoreManager:
         
     def create_vector_store(self):
         """Create a new vector store"""
-        vector_store = SKLearnVectorStore.from_documents(
+        vector_store = SKLearnVectorStore(
             metric="cosine",
             embedding=self.embeddings,
         )