feat: support pre_sales_order convert to sales_order api

printing/services.py

@@ -10,13 +10,16 @@ This module is intended for reusable business logic that may be called by:
 from __future__ import annotations
 
 from dataclasses import dataclass
+from typing import TYPE_CHECKING
 from urllib.parse import urlparse
 
 from django.conf import settings
 from django.utils import timezone
 
 from api_v1.utils.wecom_webhook import send_wecom_webhook_message
-from printing.models import PrintingJob
+
+if TYPE_CHECKING:
+    from printing.models import PrintingJob
 
 
 @dataclass(frozen=True)
@@ -188,6 +191,7 @@ def send_printing_job_latest_state_wecom(
     """
     Reusable entrypoint for command / future API.
     """
+    from printing.models import PrintingJob
     job = (
         PrintingJob.objects.select_related("printing_order", "business_object")
         .filter(id=int(printing_job_id))