Replaced SenderOrReceiverFullyAuth and ReceiverFullyAuth policies with more general SenderOrReceiver and Receiver policies. Updated policy definitions in AuthPolicy.cs to use nameof for clarity. Adjusted AddAuthorizationBuilder configuration and [Authorize] attributes in controllers to use the new, less restrictive policies, simplifying authorization logic.
Renamed AuthorizationPolicies to AuthPolicy and updated all references to use the new naming convention for authorization policy constants. This improves consistency and clarity across the codebase.
