show WorkflowMappingInvalid's help on WorkflowConfigurationFailed

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Author: adenhertog

packages/bus-core/src/workflow/configure-class-workflow.ts

@@ -3,6 +3,7 @@ import {
   WorkflowAlreadyHandlesMessage,
   WorkflowAlreadyStartedByMessage,
   WorkflowConfigurationFailed,
+  WorkflowMappingInvalid,
   WorkflowStateNotProvided
 } from './error'
 import { Workflow, WorkflowMapper } from './workflow'
@@ -54,7 +55,11 @@ export const configureClassWorkflow = <TWorkflowState extends WorkflowState>(
     ) {
       throw error
     }
-    throw new WorkflowConfigurationFailed(workflowType.name, error)
+    throw new WorkflowConfigurationFailed(
+      workflowType.name,
+      error,
+      error instanceof WorkflowMappingInvalid ? error.help : undefined
+    )
   }
 
   const workflowStateType = mapper.workflowStateCtor

packages/bus-core/src/workflow/registry/workflow-registry.spec.ts

@@ -340,6 +340,9 @@ describe('WorkflowRegistry', () => {
       expect((cause as WorkflowMappingInvalid).problem).toEqual(
         "a lookup whose lookup isn't a function"
       )
+      expect((error as WorkflowConfigurationFailed).help).toEqual(
+        (cause as WorkflowMappingInvalid).help
+      )
     })
   })