fix(force-recharge): 补充强充配置缺失的接口和数据库字段

- 订单管理：增加 payment_method 字段支持，合并代购订单逻辑
- 套餐系列分配：增加强充配置字段（enable_force_recharge、force_recharge_amount、force_recharge_trigger_type）
- 数据库迁移：添加 force_recharge_trigger_type 字段
- 测试：更新订单服务测试用例
- OpenSpec：归档 fix-force-recharge-missing-interfaces 变更

pkg/storage/service.go

@@ -10,6 +10,7 @@ import (
 	"github.com/google/uuid"
 
 	"github.com/break/junhong_cmp_fiber/pkg/config"
+	"github.com/break/junhong_cmp_fiber/pkg/errors"
 )
 
 type Service struct {
@@ -27,7 +28,7 @@ func NewService(provider Provider, cfg *config.StorageConfig) *Service {
 func (s *Service) GenerateFileKey(purpose, fileName string) (string, error) {
 	mapping, ok := PurposeMappings[purpose]
 	if !ok {
-		return "", fmt.Errorf("不支持的文件用途: %s", purpose)
+		return "", errors.New(errors.CodeInvalidParam, "不支持的文件用途: %s", purpose)
 	}
 
 	ext := filepath.Ext(fileName)

pkg/storage/types.go

@@ -12,7 +12,7 @@ type PurposeMapping struct {
 }
 
 var PurposeMappings = map[string]PurposeMapping{
-	"iot_import": {Prefix: "imports", ContentType: "text/csv"},
+	"iot_import": {Prefix: "imports", ContentType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"},
 	"export":     {Prefix: "exports", ContentType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"},
 	"attachment": {Prefix: "attachments", ContentType: ""},
 }