feat: 指定单打手响应查询与提交接口

新增 zdcx/zdhf 接口及订单表指定响应字段，供抢单页想接/不想接/等会接。

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

orders/models.py

@@ -81,6 +81,18 @@ class Order(QModel):
         max_length=32, null=True, blank=True,
         db_column='zhiding_id', verbose_name='指定ID',
     )
+    AssignedResponse = models.PositiveSmallIntegerField(
+        null=True, blank=True,
+        db_column='zhiding_hf', verbose_name='指定打手响应 1想接 2不想接 3等会接',
+    )
+    AssignedResponseAt = models.DateTimeField(
+        null=True, blank=True,
+        db_column='zhiding_hf_sj', verbose_name='指定响应时间',
+    )
+    AssignedLaterNote = models.CharField(
+        max_length=100, blank=True, default='',
+        db_column='zhiding_dhj_sm', verbose_name='等会接说明',
+    )
     ProductID = models.IntegerField(
         null=True, blank=True,
         db_column='shangpin_id', verbose_name='商品ID',