unit test bug fixes

tests/unit/middleware/test_rate_limiter.py

@@ -474,10 +474,13 @@ class TestRateLimiterEdgeCases:
     def test_cleanup_updates_last_cleanup_time(self):
         """Test that cleanup updates last_cleanup timestamp."""
         limiter = RateLimiter()
-        old_cleanup_time = limiter.last_cleanup
 
-        # Force cleanup
-        limiter.cleanup_interval = 0
+        # Set last_cleanup to past to ensure cleanup triggers
+        old_cleanup_time = datetime.now(timezone.utc) - timedelta(hours=2)
+        limiter.last_cleanup = old_cleanup_time
+        limiter.cleanup_interval = 0  # Force cleanup on next request
+
+        # Make request (should trigger cleanup)
         limiter.allow_request("test", 10, 3600)
 
         # last_cleanup should be updated