Perf: set timeout of some steps in KG. (#8873)

### What problem does this PR solve?

### Type of change


- [x] Performance Improvement

api/db/services/document_service.py

@@ -583,6 +583,8 @@ class DocumentService(CommonService):
                     info["progress"] = prg
                 if msg:
                     info["progress_msg"] = msg
+                    if msg.endswith("created task graphrag") or msg.endswith("created task raptor"):
+                        info["progress_msg"] += "\n%d tasks are ahead in the queue..."%get_queue_length(priority)
                 else:
                     info["progress_msg"] = "%d tasks are ahead in the queue..."%get_queue_length(priority)
                 cls.update_by_id(d["id"], info)