address bugbot comments and fix tests

apps/sim/executor/handlers/workflow/workflow-handler.test.ts

@@ -198,6 +198,7 @@ describe('WorkflowBlockHandler', () => {
 
       expect(result).toEqual({
         success: true,
+        childWorkflowId: 'child-id',
         childWorkflowName: 'Child Workflow',
         result: { data: 'test result' },
         childTraceSpans: [],
@@ -235,6 +236,7 @@ describe('WorkflowBlockHandler', () => {
 
       expect(result).toEqual({
         success: true,
+        childWorkflowId: 'child-id',
         childWorkflowName: 'Child Workflow',
         result: { nested: 'data' },
         childTraceSpans: [],

apps/sim/executor/handlers/workflow/workflow-handler.ts

@@ -536,6 +536,7 @@ export class WorkflowBlockHandler implements BlockHandler {
         message: `"${childWorkflowName}" failed: ${childResult.error || 'Child workflow execution failed'}`,
         childWorkflowName,
         childTraceSpans: childTraceSpans || [],
+        childWorkflowSnapshotId,
       })
     }
 
@@ -543,7 +544,7 @@ export class WorkflowBlockHandler implements BlockHandler {
       success: true,
       childWorkflowName,
       childWorkflowId,
-      childWorkflowSnapshotId,
+      ...(childWorkflowSnapshotId ? { childWorkflowSnapshotId } : {}),
       result,
       childTraceSpans: childTraceSpans || [],
     } as Record<string, any>