fix: 工单图片/升级表冗余字段改名，避免与外键 gongdan_id 冲突

Co-authored-by: Cursor <cursoragent@cursor.com>

gongdan/services.py

@@ -132,7 +132,7 @@ def _replace_images(gd, image_urls):
     for i, url in enumerate(urls):
         GongdanImage.objects.create(
             gongdan=gd,
-            gongdan_id=gd.gongdan_id,
+            gongdan_hao=gd.gongdan_id,
             url=url[:512],
             paixu=i,
         )
@@ -210,7 +210,7 @@ def escalate_gongdan(*, gongdan_id, yonghuid, shuoming, image_urls=None):
     next_cishu = (gd.shengji_cishu or 0) + 1
     GongdanShengji.objects.create(
         gongdan=gd,
-        gongdan_id=gd.gongdan_id,
+        gongdan_hao=gd.gongdan_id,
         cishu=next_cishu,
         shuoming=text,
         shenqingren_id=yonghuid,