pipeline cache and dispatch optimizations

src/Just.Cqrs.Abstractions/Internal/IGenericHandler.cs

@@ -0,0 +1,10 @@
+namespace Just.Cqrs.Internal;
+
+/// <summary>
+/// Marker interface for static type checking. Should not be used directly.
+/// </summary>
+public interface IGenericHandler<TRequest, TResponse>
+    where TRequest : notnull
+{
+    ValueTask<TResponse> Handle(TRequest request, CancellationToken cancellation);
+}