Fix test: Use string value for RunParallel in YAML and add Static binding flag

Co-authored-by: danielgerlag <2357007+danielgerlag@users.noreply.github.com>

Author: Copilot

src/WorkflowCore.DSL/Services/DefinitionLoader.cs

@@ -222,7 +222,7 @@ private void AttachInputs(StepSourceV1 source, Type dataType, Type stepType, Wor
                 var dataParameter = Expression.Parameter(dataType, "data");
                 var contextParameter = Expression.Parameter(typeof(IStepExecutionContext), "context");
                 var environmentVarsParameter = Expression.Parameter(typeof(IDictionary), "environment");
-                var stepProperty = stepType.GetProperty(input.Key, BindingFlags.Public | BindingFlags.Instance);
+                var stepProperty = stepType.GetProperty(input.Key, BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static);
 
                 if (stepProperty == null)
                 {

test/WorkflowCore.UnitTests/Services/DefinitionStorage/YamlInheritedPropertyIntegrationTest.cs

@@ -31,7 +31,7 @@ public void ShouldBindInheritedPropertiesInYamlDefinition()
     StepType: WorkflowCore.TestAssets.Steps.IterateListStep, WorkflowCore.TestAssets
     Inputs:
       Collection: ""data.DataList""
-      RunParallel: false
+      RunParallel: ""false""
 ";
 
             // Act & Assert