Updated `AuthScheme` to introduce a distinct `Sender` scheme
and renamed the `Receiver` scheme for clarity. Updated
`Program.cs` to use the new `Sender` scheme in JWT
authentication and explicitly associate authentication
schemes with `Sender` and `Receiver` policies. Removed the
deprecated `AuthPolicy.ReceiverTFA` policy. These changes
improve the separation and maintainability of authentication
and authorization logic.
TekH
d828a5bfe2