Fixed regression bug with aggregate handler workflow and query string…

src/Http/Wolverine.Http/CodeGen/QueryStringBindingFrame.cs

@@ -28,6 +28,8 @@ public bool TryMatch(HttpChain chain, IServiceContainer container, ParameterInfo
         if (parameter.ParameterType.IsTypeOrNullableOf<TimeSpan>()) return false;
         if (parameter.ParameterType.IsTypeOrNullableOf<Guid>()) return false;
 
+        chain.ComplexQueryStringType = parameter.ParameterType;
+
         variable = new QueryStringBindingFrame(parameter.ParameterType, chain).Variable;
         return true;
     }

src/Http/Wolverine.Http/HttpChain.cs

@@ -281,7 +281,7 @@ public override bool HasAttribute<T>()
 
     public override Type? InputType()
     {
-        return HasRequestType ? RequestType : null;
+        return HasRequestType ? RequestType : ComplexQueryStringType;
     }
 
     public override Frame[] AddStopConditionIfNull(Variable variable)
@@ -642,6 +642,7 @@ public HttpElementVariable GetOrCreateHeaderVariable(IFromHeaderMetadata metadat
     public bool HasRequestType => RequestType != null && RequestType != typeof(void);
 
     public bool IsFormData { get; internal set; }
+    public Type? ComplexQueryStringType { get; set; }
 
     internal Variable BuildJsonDeserializationVariable()
     {

src/Persistence/Wolverine.Marten/AggregateHandlerAttribute.cs

@@ -76,8 +76,10 @@ public override void Modify(IChain chain, GenerationRules rules, IServiceContain
 
         CommandType = chain.InputType();
         if (CommandType == null)
+        {
             throw new InvalidOperationException(
                 $"Cannot apply Marten aggregate handler workflow to chain {chain} because it has no input type");
+        }
 
         AggregateType ??= DetermineAggregateType(chain);