feat：增加用户服务需求数据模型

app/api/enterprise/model/service_demand.go

@@ -0,0 +1,11 @@
+package model
+
+import "SciencesServer/app/common/model"
+
+type ServiceDemand struct {
+	*model.ServiceDemand
+}
+
+func NewServiceDemand() *ServiceDemand {
+	return &ServiceDemand{model.NewServiceDemand()}
+}