收口七月卡状态回调与系列授权兼容契约

完成运营商实名回调、业务事件观测序列与受控配置装配，同时恢复 UR43 已交付的 packages[].remove 字段及旧响应兼容，统一更新 OpenSpec、OpenAPI 和交付文档。

Constraint: 七月测试环境里程碑不新增或运行自动化测试

Rejected: 以必填 operation_type 替换 packages[].remove | 会破坏已交付前端契约

Confidence: high

Scope-risk: broad

Directive: 后续修改系列套餐管理接口必须保持 packages[].remove 和 ShopSeriesGrantResponse 兼容

Tested: go run ./cmd/gendocs；go build -buildvcs=false ./...；openspec validate complete-july-iteration-test-release --strict；git diff --check

Not-tested: 按本 Change 约定未运行 go test，真实运营商与 Gateway 联调延期

pkg/queue/card_observation_series.go

@@ -9,6 +9,7 @@ import (
 
 	cardapp "github.com/break/junhong_cmp_fiber/internal/application/cardobservation"
 	"github.com/break/junhong_cmp_fiber/pkg/constants"
+	pkgerrors "github.com/break/junhong_cmp_fiber/pkg/errors"
 )
 
 // CardObservationSeriesScheduler 将固定阶梯任务提交到独立队列。
@@ -23,6 +24,9 @@ func NewCardObservationSeriesScheduler(client *Client) *CardObservationSeriesSch
 
 // Enqueue 以稳定 series_id + attempt 任务 ID 零重试入队。
 func (s *CardObservationSeriesScheduler) Enqueue(ctx context.Context, payload cardapp.SeriesTaskPayload) error {
+	if s == nil || s.client == nil {
+		return pkgerrors.New(pkgerrors.CodeInternalError, "卡观测序列队列客户端未配置")
+	}
 	taskID := "card-series-" + payload.SeriesID + "-" + strconv.Itoa(payload.Attempt)
 	err := s.client.EnqueueTask(
 		ctx,