fixed docs

src/rag.py

@@ -146,7 +146,8 @@ class FaissDB:
     def similarity_search(self, query: str, k: int = 5):
         if self.index is None:
             raise ValueError("Index is not initialized")
-        return self.index.similarity_search(query, k)
+        documents = self.index.similarity_search(query, k)
+        return [doc.page_content for doc in documents]
 
 
 class AICompletion: