feat: 实现设备管理和设备导入功能，修复测试问题

主要变更：
- 实现设备管理模块（创建、查询、列表、更新状态、删除）
- 实现设备批量导入功能（CSV 解析、ICCID 绑定、异步任务处理）
- 添加设备-SIM 卡绑定约束（部分唯一索引防止并发问题）
- 修复 fee_rate 数据库字段类型（numeric -> bigint）
- 修复测试数据隔离问题（基于增量断言）
- 修复集成测试中间件顺序问题
- 清理无用测试文件（PersonalCustomer、Email 相关）
- 归档 enterprise-card-authorization 变更

internal/handler/admin/device_import.go

@@ -0,0 +1,86 @@
+package admin
+
+import (
+	"strconv"
+
+	"github.com/gofiber/fiber/v2"
+
+	"github.com/break/junhong_cmp_fiber/internal/model/dto"
+	deviceImportService "github.com/break/junhong_cmp_fiber/internal/service/device_import"
+	"github.com/break/junhong_cmp_fiber/pkg/constants"
+	"github.com/break/junhong_cmp_fiber/pkg/errors"
+	"github.com/break/junhong_cmp_fiber/pkg/middleware"
+	"github.com/break/junhong_cmp_fiber/pkg/response"
+)
+
+type DeviceImportHandler struct {
+	service *deviceImportService.Service
+}
+
+func NewDeviceImportHandler(service *deviceImportService.Service) *DeviceImportHandler {
+	return &DeviceImportHandler{
+		service: service,
+	}
+}
+
+func (h *DeviceImportHandler) Import(c *fiber.Ctx) error {
+	userType := middleware.GetUserTypeFromContext(c.UserContext())
+	if userType != constants.UserTypeSuperAdmin && userType != constants.UserTypePlatform {
+		return errors.New(errors.CodeForbidden, "仅平台用户可导入设备")
+	}
+
+	var req dto.ImportDeviceRequest
+	if err := c.BodyParser(&req); err != nil {
+		return errors.New(errors.CodeInvalidParam, "请求参数解析失败")
+	}
+
+	if req.FileKey == "" {
+		return errors.New(errors.CodeInvalidParam, "文件路径不能为空")
+	}
+
+	result, err := h.service.CreateImportTask(c.UserContext(), &req)
+	if err != nil {
+		return err
+	}
+
+	return response.Success(c, result)
+}
+
+func (h *DeviceImportHandler) List(c *fiber.Ctx) error {
+	userType := middleware.GetUserTypeFromContext(c.UserContext())
+	if userType != constants.UserTypeSuperAdmin && userType != constants.UserTypePlatform {
+		return errors.New(errors.CodeForbidden, "仅平台用户可查看导入任务")
+	}
+
+	var req dto.ListDeviceImportTaskRequest
+	if err := c.QueryParser(&req); err != nil {
+		return errors.New(errors.CodeInvalidParam, "请求参数解析失败")
+	}
+
+	result, err := h.service.List(c.UserContext(), &req)
+	if err != nil {
+		return err
+	}
+
+	return response.SuccessWithPagination(c, result.List, result.Total, result.Page, result.PageSize)
+}
+
+func (h *DeviceImportHandler) GetByID(c *fiber.Ctx) error {
+	userType := middleware.GetUserTypeFromContext(c.UserContext())
+	if userType != constants.UserTypeSuperAdmin && userType != constants.UserTypePlatform {
+		return errors.New(errors.CodeForbidden, "仅平台用户可查看导入任务详情")
+	}
+
+	idStr := c.Params("id")
+	id, err := strconv.ParseUint(idStr, 10, 64)
+	if err != nil {
+		return errors.New(errors.CodeInvalidParam, "无效的任务ID")
+	}
+
+	result, err := h.service.GetByID(c.UserContext(), uint(id))
+	if err != nil {
+		return err
+	}
+
+	return response.Success(c, result)
+}