feat(model): 同步 vivid 最新变更 — 去模型开关,配价即上架

对齐 vivid a338edb / 7fb5c57 / 4f454b6:
- model_configs.enabled 列删除:上架唯一门槛 = 绑定了启用渠道 + 全部档位
  有价(视频另需时长有价)。/v1/models、/api/models、video-presets、
  managed-models 全部改按 sellable 透出
- 保存渠道即全量同步上游模型(消失解绑/孤儿删除/失败告警不删库)
- v1 job 持久化 upstream jobId,重启后维护循环按 jobId 续等不丢单

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Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

backend/internal/bootstrap/app.go

@@ -68,6 +68,10 @@ func NewApp(ctx context.Context) (*App, error) {
 		`ON cdk_codes (batch_id, redeemed_by) WHERE type = 'marketing' AND redeemed_by IS NOT NULL`).Error; err != nil {
 		return nil, fmt.Errorf("cdk marketing index: %w", err)
 	}
+	// 配价即上架（vivid 同款）：models 不再有启停开关，删遗留列。
+	if err := db.WithContext(ctx).Exec(`ALTER TABLE model_configs DROP COLUMN IF EXISTS enabled`).Error; err != nil {
+		return nil, fmt.Errorf("drop model_configs.enabled: %w", err)
+	}
 	if err := seedDefaults(ctx, db); err != nil {
 		return nil, fmt.Errorf("seed defaults: %w", err)
 	}
@@ -159,7 +163,7 @@ func NewApp(ctx context.Context) (*App, error) {
 
 	// Background self-healing sweep (order expiry, stale-pending cleanup+refund,
 	// log/media retention).
-	maintenanceSvc := service.NewMaintenanceService(eventRepo, userRepo, siteRepo, rustfsClient, v1Svc.Inflight(), showcaseRepo, orderRepo)
+	maintenanceSvc := service.NewMaintenanceService(eventRepo, userRepo, siteRepo, rustfsClient, v1Svc, showcaseRepo, orderRepo)
 	loopCtx, loopCancel := context.WithCancel(context.Background())
 	go maintenanceSvc.Run(loopCtx)