feat(phase2): 数据回传聚合与可信分账(F09/F18)

- internal/playback: 播放事件存储/MA码维度聚合/分账结算(CP60/平台34/服务费6)
- service: ReportPlayback(链上状态门禁)/PlaybackSummary/ComputeSettlement
- api: /data/playback, /data/playback-summary, /settlement/compute
- 分账取余兜底无丢分; 未知/已下架MA码回传被拒
- 13项新测试通过; 端到端验证: 回传3条→聚合40元→分账24/13.6/2.4

tcs-iptv/internal/service/service.go

@@ -12,6 +12,7 @@ import (
 	"github.com/tcs-iptv/tcs/internal/chain"
 	"github.com/tcs-iptv/tcs/internal/macode"
 	"github.com/tcs-iptv/tcs/internal/model"
+	"github.com/tcs-iptv/tcs/internal/playback"
 )
 
 // 业务错误。
@@ -49,6 +50,7 @@ type SubmissionResult struct {
 type Service struct {
 	chain chain.Client
 	gen   *macode.Generator
+	pb    *playback.Store
 	mu    sync.Mutex
 	seqMu sync.Mutex
 	seqs  map[string]int // 按前缀独立计数（REV/ctid/DIST 各自从 1 递增）
@@ -65,7 +67,7 @@ type reviewItem struct {
 
 // New 创建业务服务。
 func New(c chain.Client, gen *macode.Generator) *Service {
-	return &Service{chain: c, gen: gen, seqs: make(map[string]int), reviews: make(map[string]*reviewItem)}
+	return &Service{chain: c, gen: gen, pb: playback.NewStore(), seqs: make(map[string]int), reviews: make(map[string]*reviewItem)}
 }
 
 func (s *Service) nextID(prefix string) string {