fix: update gRPC service configuration to use CmsServerBaseUrl resolver

- Replace direct access to configuration for GwUrl with CmsServerBaseUrl.Resolve in AddGrpcServices and TokenNotificationService.
- Ensure proper error handling for missing GwUrl and add support for optional bypass of public TLS using CmsInternalBaseUrl.
- Adjust channel credentials based on whether the base URL is HTTPS or not.

src/FrontOffice.Main/Utilities/TokenNotificationService.cs

@@ -69,7 +69,7 @@ public class TokenNotificationService : IAsyncDisposable
                 return;
             }
 
-            var gwUrl = _configuration["GwUrl"]?.TrimEnd('/') ?? "https://localhost:5002";
+            var gwUrl = CmsServerBaseUrl.Resolve(_configuration) ?? "https://localhost:5002";
             var hubPath = _configuration["SignalR:HubPath"] ?? "/hubs/token-relay";
             var hubUrl = $"{gwUrl}{hubPath}";