thread-master/docs/product/brand-product-radar/tasks/T772-outcome-event-product-attribution.md

T772 — outcome event product attribution

Status: todo
Milestone: M7 · Phase D
Kind: feat · Est. change: ~160 lines

Goal

成交回報保存成交當下 Product 歸屬，沿用既有 OutcomeEvent 且不改寫舊成交。

Depends on

• T762、T771

Inputs

• growth OutcomeEvent domain／radar conversion flow
• ../spec.md §4.5、§6

Outputs

路徑	動作	說明
apps/backend/internal/module/growth/domain/domain.go	edit	optional product_id／brand_id attribution
radar/crm conversion usecase	edit	won 當下取 primary snapshot IDs
apps/backend/internal/module/growth/repository/{memory,mongo}.go	edit	optional fields backward compatible
apps/backend/internal/logic/growthmap/map.go	edit	public outcome mapping
conversion tests	edit/add	product、legacy、amend/delete audit

Behavior

• 只有人可回報成交；不自動推進或另建成交帳。
• 後續 Product 刪除／primary 改變不改舊 OutcomeEvent。
• legacy outcome 欄位可空，既有彙總不受影響。

Out of scope

• 產品成交率頁與自動調校（P1）
• 金額規則重做

Acceptance

• 既有 growth tests 全綠，product attribution 可讀可稽核。

cd apps/backend && go test ./internal/module/growth/... ./internal/module/crm/... ./internal/module/radar/... -count=1