fix(deps): bump requests to 2.32.4 for .netrc credentials leak fix

The .netrc vulnerability (CVE) requires requests >= 2.32.4

Author: claude

monitoring_flask_backend/requirements.txt

@@ -2,5 +2,5 @@ Flask==3.0.0
 prometheus-api-client==0.5.4
 python-dateutil==2.8.2
 gunicorn==23.0.0
-requests==2.32.3
+requests==2.32.4
 pytest==8.3.4