fix: product sync error cause duplicate data

api_v1/tasks.py

@@ -197,12 +197,19 @@ def _upsert_product(product_data, merchant, category):
     if segment_decimal is not None:
         defaults['segment_size'] = segment_decimal
 
-    product_obj, created = basic_models.Product.objects.get_or_create(
+    # 使用 filter().first() 替代 get_or_create，容忍重复数据
+    product_obj = basic_models.Product.objects.filter(
         merchant=merchant,
         human_id=product_data.uid,
-        defaults=defaults,
-    )
-    if created:
+    ).first()
+    
+    if product_obj is None:
+        # 不存在，创建新记录
+        product_obj = basic_models.Product.objects.create(
+            merchant=merchant,
+            human_id=product_data.uid,
+            **defaults,
+        )
         return True
 
     if not product_obj.from_mdy: