Iterators design updates (#15146)

A few fixes :
- add a counter of iteration for nodes that have been run
<img width="601" height="538" alt="Capture d’écran 2025-10-16 à 17 50
07"
src="https://github.com/user-attachments/assets/de9d56ed-3057-4a67-b1d7-b421f644d11d"
/>

- if a node has fail, we should end the workflow even if a step is still
running
- fix position for add node button in iterator loop :
Before


https://github.com/user-attachments/assets/eafeda64-977f-415d-bab4-b7d0c44406b0

After


https://github.com/user-attachments/assets/6ff221a3-b287-45f6-977f-b127f9998692

packages/twenty-server/src/modules/workflow/workflow-executor/workspace-services/workflow-executor.workspace-service.ts

@@ -224,10 +224,6 @@ export class WorkflowExecutorWorkspaceService {
 
     const steps = workflowRun.state.flow.steps;
 
-    if (workflowShouldKeepRunning({ stepInfos, steps })) {
-      return;
-    }
-
     if (workflowShouldFail({ stepInfos, steps })) {
       await this.workflowRunWorkspaceService.endWorkflowRun({
         workflowRunId,
@@ -239,6 +235,10 @@ export class WorkflowExecutorWorkspaceService {
       return;
     }
 
+    if (workflowShouldKeepRunning({ stepInfos, steps })) {
+      return;
+    }
+
     await this.workflowRunWorkspaceService.endWorkflowRun({
       workflowRunId,
       workspaceId,