Greetings from changedetection.io, thanks for your work!

Our tests started failing, turns out related (somehow) to Werkzeug 3.1.0

We have a test endpoint that is looking at the headers that were sent with a request

https://github.com/dgtlmoon/changedetection.io/blob/7029d10f8bd22ac2379fcfe70bf57b67ebee69fc/changedetectionio/tests/util.py#L231

for example

    # Where we POST to as a notification
    @live_server.app.route('/test_notification_endpoint', methods=['POST', 'GET'])
    def test_notification_endpoint():
        p = request.headers

but request.headers is always empty (by empty i mean contains \r\n), downgrading to 3.0.6 fixed it (from 3.1.0)

Tried python 3.10, 3.11, and 3.12

pytest                       7.4.4
pytest-flask                 1.3.0
Werkzeug                     3.0.6 (this version is OK)

Strangely, all other variables in request look perfectly OK, tcpdump shows the headers are being sent without problem, HTTP_ type vars in the request look OK too

thanks!