Fix backend status endpoint returning state linfo

app.py

@@ -51,7 +51,12 @@ async def query_google_scholar(params: APISearchParams):
 
 @app.get('/')
 async def status():
-    return {"status": "running", "backend_status": backend_status.items_with_timestamp()}
+    backend_keys = [k[0] for k in backend_status.items()]
+    backend_status_dict = {}
+
+    for k in backend_keys:
+        backend_status_dict[k] = backend_status.get(k)
+    return {"status": "running", "backend_status": backend_status_dict}
 
 
 @app.post("/search_patents")