refactor: 出库时间更名为首次购买套餐时间，换货新资产不再按换货完成时间记录

- 字段 outbound_at → first_purchase_at，记录表 tb_asset_outbound_record → tb_asset_first_purchase_record，接口 /outbound-records → /first-purchase-records，筛选参数与导出列同步更名
- 换货后的新资产不因换货写入，在当前世代真正支付套餐订单时才记录；记录来源只保留 order / backfill，去掉换货单字段
- 迁移 000266 重命名列、表、索引与约束；同步 Spec、设计、任务与前端接口变更说明

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/store/postgres/device_store.go

@@ -231,11 +231,11 @@ func (s *DeviceStore) applyDeviceFilters(ctx context.Context, query *gorm.DB, fi
 				Select("device_id").
 				Where("enterprise_id = ? AND revoked_at IS NULL AND deleted_at IS NULL", enterpriseID))
 	}
-	if start, ok := filters["outbound_start"].(time.Time); ok {
-		query = query.Where("outbound_at >= ?", start)
+	if start, ok := filters["first_purchase_start"].(time.Time); ok {
+		query = query.Where("first_purchase_at >= ?", start)
 	}
-	if end, ok := filters["outbound_end"].(time.Time); ok {
-		query = query.Where("outbound_at <= ?", end)
+	if end, ok := filters["first_purchase_end"].(time.Time); ok {
+		query = query.Where("first_purchase_at <= ?", end)
 	}
 	if isAuthorized, ok := filters["is_authorized_to_enterprise"].(bool); ok {
 		subQ := s.db.WithContext(ctx).Table("tb_enterprise_device_authorization").

internal/store/postgres/iot_card_store.go

@@ -915,11 +915,11 @@ func (s *IotCardStore) applyStandaloneFilters(ctx context.Context, query *gorm.D
 				Select("card_id").
 				Where("enterprise_id = ? AND revoked_at IS NULL AND deleted_at IS NULL", enterpriseID))
 	}
-	if start, ok := filters["outbound_start"].(time.Time); ok {
-		query = query.Where("outbound_at >= ?", start)
+	if start, ok := filters["first_purchase_start"].(time.Time); ok {
+		query = query.Where("first_purchase_at >= ?", start)
 	}
-	if end, ok := filters["outbound_end"].(time.Time); ok {
-		query = query.Where("outbound_at <= ?", end)
+	if end, ok := filters["first_purchase_end"].(time.Time); ok {
+		query = query.Where("first_purchase_at <= ?", end)
 	}
 	if isAuthorized, ok := filters["is_authorized_to_enterprise"].(bool); ok {
 		subQ := s.db.WithContext(ctx).Table("tb_enterprise_card_authorization").

internal/store/postgres/package_silence_store.go

@@ -278,16 +278,16 @@ func (s *PackageSilenceOrderStore) TransitionStatus(ctx context.Context, id uint
 	return result.RowsAffected, result.Error
 }
 
-// AssetOutboundRecordStore 资产出库记录 Store（只新增与填写结束信息）。
-type AssetOutboundRecordStore struct{ db *gorm.DB }
+// AssetFirstPurchaseRecordStore 资产首次购买套餐记录 Store（只新增与填写结束信息）。
+type AssetFirstPurchaseRecordStore struct{ db *gorm.DB }
 
-// NewAssetOutboundRecordStore 创建出库记录 Store。
-func NewAssetOutboundRecordStore(db *gorm.DB) *AssetOutboundRecordStore {
-	return &AssetOutboundRecordStore{db: db}
+// NewAssetFirstPurchaseRecordStore 创建首次购买套餐记录 Store。
+func NewAssetFirstPurchaseRecordStore(db *gorm.DB) *AssetFirstPurchaseRecordStore {
+	return &AssetFirstPurchaseRecordStore{db: db}
 }
 
-// CreateIfAbsent 插入一条出库记录；同一资产同一世代已存在时不插入，返回是否插入。
-func (s *AssetOutboundRecordStore) CreateIfAbsent(ctx context.Context, record *model.AssetOutboundRecord) (bool, error) {
+// CreateIfAbsent 插入一条首次购买套餐记录；同一资产同一世代已存在时不插入，返回是否插入。
+func (s *AssetFirstPurchaseRecordStore) CreateIfAbsent(ctx context.Context, record *model.AssetFirstPurchaseRecord) (bool, error) {
 	result := s.db.WithContext(ctx).Clauses(clause.OnConflict{
 		Columns:   []clause.Column{{Name: "asset_type"}, {Name: "asset_id"}, {Name: "generation"}},
 		DoNothing: true,
@@ -295,17 +295,17 @@ func (s *AssetOutboundRecordStore) CreateIfAbsent(ctx context.Context, record *m
 	return result.RowsAffected == 1, result.Error
 }
 
-// EndGeneration 为某资产某世代的出库记录填写结束时间与原因，返回影响行数。
-func (s *AssetOutboundRecordStore) EndGeneration(ctx context.Context, assetType string, assetID uint, generation int, endedAt time.Time, reason string) (int64, error) {
-	result := s.db.WithContext(ctx).Model(&model.AssetOutboundRecord{}).
+// EndGeneration 为某资产某世代的首次购买套餐记录填写结束时间与原因，返回影响行数。
+func (s *AssetFirstPurchaseRecordStore) EndGeneration(ctx context.Context, assetType string, assetID uint, generation int, endedAt time.Time, reason string) (int64, error) {
+	result := s.db.WithContext(ctx).Model(&model.AssetFirstPurchaseRecord{}).
 		Where("asset_type = ? AND asset_id = ? AND generation = ? AND ended_at IS NULL", assetType, assetID, generation).
 		Updates(map[string]any{"ended_at": endedAt, "end_reason": reason})
 	return result.RowsAffected, result.Error
 }
 
-// ListByAsset 按资产查询各世代出库记录（世代倒序）。
-func (s *AssetOutboundRecordStore) ListByAsset(ctx context.Context, assetType string, assetID uint) ([]model.AssetOutboundRecord, error) {
-	var records []model.AssetOutboundRecord
+// ListByAsset 按资产查询各世代首次购买套餐记录（世代倒序）。
+func (s *AssetFirstPurchaseRecordStore) ListByAsset(ctx context.Context, assetType string, assetID uint) ([]model.AssetFirstPurchaseRecord, error) {
+	var records []model.AssetFirstPurchaseRecord
 	err := s.db.WithContext(ctx).Where("asset_type = ? AND asset_id = ?", assetType, assetID).
 		Order("generation DESC").Find(&records).Error
 	return records, err