Refactor article retrieval to use article titles (urls)

-	Updated article retrieval logic to fetch actual article details from the database instead of using placeholder titles.
-	Now when we execute hybrid and hybrid_hyde workflows, we get the article links (with titles and not just article ids).

Author: Zafarhussain87

src/lex_llm/api/connectors/lex_db_connector.py

@@ -149,4 +149,4 @@ async def hyde_search(
             return []
         except httpx.RequestError as e:
             print(f"Error connecting to LexDB: {e}")
-            return []
+            return []