chore: snapshot workflow migration progress

backend/app/domains/pipeline/tasks/extract_metadata.py

@@ -31,7 +31,13 @@ def _bbox_from_step_cadquery(step_path: str) -> dict | None:
 
 
 @celery_app.task(bind=True, name="app.tasks.step_tasks.process_step_file", queue="step_processing")
-def process_step_file(self, cad_file_id: str):
+def process_step_file(
+    self,
+    cad_file_id: str,
+    workflow_run_id: str | None = None,
+    workflow_node_id: str | None = None,
+    **_: object,
+):
     """Process a STEP file: extract objects, generate thumbnail, convert to glTF.
 
     After processing completes, auto-populate cad_part_materials from Excel
@@ -122,10 +128,24 @@ def process_step_file(self, cad_file_id: str):
         r.delete(lock_key)  # always release on completion or unhandled error
 
     pl.step_done("process_step_file")
+    try:
+        from app.domains.rendering.tasks import _update_workflow_run_status
 
-    # Queue thumbnail rendering on the dedicated single-concurrency worker
-    from app.domains.pipeline.tasks.render_thumbnail import render_step_thumbnail
-    render_step_thumbnail.delay(cad_file_id)
+        _update_workflow_run_status(
+            cad_file_id,
+            "completed",
+            workflow_run_id=workflow_run_id,
+            workflow_node_id=workflow_node_id,
+        )
+    except Exception:
+        logger.exception("Failed to update workflow state for process_step_file %s", cad_file_id)
+
+    # Legacy flow still auto-queues thumbnail generation here.
+    # Graph-mode workflows dispatch explicit thumbnail save/render nodes instead.
+    if workflow_run_id is None:
+        from app.domains.pipeline.tasks.render_thumbnail import render_step_thumbnail
+
+        render_step_thumbnail.delay(cad_file_id)
 
 
 def _auto_populate_materials_for_cad(cad_file_id: str, tenant_id: str | None = None) -> None: