Shopware SSO login doesn't work with admin watcher

### PHP Version

-

### Shopware Version

-

### Affected area / extension

Platform(Default)

### Actual behaviour

~~The login URL doesn’t get forwarded through the admin watcher proxy, because it isn’t a /api URL. Instead it’s a /admin/sso/... URL and thus gets called by the browser directly, which creates a different session.~~ Not sure if this is still the case / underlying issue but either way the admin watcher proxy seems to case issues with the SSO login which requires redirects.

We should consult the admin team to find a solution to this, because running into this issue can be very confusing, as it will just reject the login (because random value in session doesn’t match).

### Expected behaviour

The shopware SSO login works with and without the admin watcher.

### How to reproduce

Use the latest trunk of platform + rufus + commercial and setup SSO locally according to the rufus readme then start the watcher and try to log in.