downgrade authlib to 1.3.1

backend/requirements.txt

@@ -69,7 +69,7 @@ rank-bm25==0.2.2
 faster-whisper==1.0.3
 
 PyJWT[crypto]==2.9.0
-authlib==1.3.2
+authlib==1.3.1
 
 black==24.8.0
 langfuse==2.44.0