fix: 工单三方审批不支持修改资产 (#8582)

Co-authored-by: feng626 <1304903146@qq.com>

apps/tickets/handlers/base.py

@@ -64,9 +64,14 @@ class BaseHandler:
         diff_context = {}
         if state != TicketState.approved:
             return diff_context
+
         if self.ticket.type not in [TicketType.apply_asset, TicketType.apply_application]:
             return diff_context
 
+        # 企业微信，钉钉审批不做diff
+        if not hasattr(self.ticket, 'old_rel_snapshot'):
+            return diff_context
+
         old_rel_snapshot = self.ticket.old_rel_snapshot
         current_rel_snapshot = self.ticket.get_local_snapshot()
         diff = set(current_rel_snapshot.items()) - set(old_rel_snapshot.items())