重构: 将卡/设备的套餐系列绑定从分配ID改为系列ID

- 数据库: 重命名 series_allocation_id → series_id
- Model: IotCard 和 Device 字段重命名
- DTO: 所有请求/响应字段统一为 series_id
- Store: 方法重命名，新增 GetByShopAndSeries 查询
- Service: 业务逻辑优化，系列验证和权限验证分离
- 测试: 更新所有测试用例，新增 shop_series_allocation_store_test.go
- 文档: 更新 API 文档说明参数变更

BREAKING CHANGE: API 参数从 series_allocation_id 改为 series_id

internal/service/purchase_validation/service_test.go

@@ -75,21 +75,21 @@ func setupTestData(t *testing.T) (context.Context, *Service, *model.IotCard, *mo
 
 	shopIDPtr := &shop.ID
 	card := &model.IotCard{
-		ICCID:              "89860000000000000001",
-		ShopID:             shopIDPtr,
-		CarrierID:          carrier.ID,
-		SeriesAllocationID: &allocation.ID,
-		Status:             constants.StatusEnabled,
-		BaseModel:          model.BaseModel{Creator: 1, Updater: 1},
+		ICCID:     "89860000000000000001",
+		ShopID:    shopIDPtr,
+		CarrierID: carrier.ID,
+		SeriesID:  &series.ID,
+		Status:    constants.StatusEnabled,
+		BaseModel: model.BaseModel{Creator: 1, Updater: 1},
 	}
 	require.NoError(t, iotCardStore.Create(ctx, card))
 
 	device := &model.Device{
-		DeviceNo:           "DEV_TEST_PV_001",
-		ShopID:             shopIDPtr,
-		SeriesAllocationID: &allocation.ID,
-		Status:             constants.StatusEnabled,
-		BaseModel:          model.BaseModel{Creator: 1, Updater: 1},
+		DeviceNo:  "DEV_TEST_PV_001",
+		ShopID:    shopIDPtr,
+		SeriesID:  &series.ID,
+		Status:    constants.StatusEnabled,
+		BaseModel: model.BaseModel{Creator: 1, Updater: 1},
 	}
 	require.NoError(t, deviceStore.Create(ctx, device))