hopefully not a horribly foolish refactoring

Femto.Common/Domain/DomainException.cs

@@ -1,3 +1,7 @@
 namespace Femto.Common.Domain;
 
-public class DomainException(string message) : Exception(message);
+public class DomainException : Exception
+{
+    public DomainException(string message, Exception innerException) : base(message, innerException) {}
+    public DomainException(string message) : base(message) {}
+}

Femto.Common/Domain/ICommand.cs

@@ -0,0 +1,7 @@
+using MediatR;
+
+namespace Femto.Common.Domain;
+
+public interface ICommand : IRequest;
+
+public interface ICommand<out T> : IRequest<T>;

Femto.Common/Domain/IQuery.cs

@@ -0,0 +1,5 @@
+using MediatR;
+
+namespace Femto.Common.Domain;
+
+public interface IQuery<out T> : IRequest<T>;