fix(backend): 修复并发任务聚合——当前位置汇总全部负责人、最新动态携带操作人、状态聚合补齐 REJECTED

backend/app/schemas/product.py

@@ -59,6 +59,8 @@ class ProductResponse(BaseModel):
     latest_record_time: datetime | None = None
     latest_record_content: str | None = None
     latest_record_has_images: bool = False
+    latest_record_assignee_id: str | None = None    # 🔧 最新记录操作人（消除并发张冠李戴）
+    latest_record_assignee_name: str | None = None
 
     model_config = {"from_attributes": True}