feat(pricing): 开发定价方案

packages/database/migrations/049_logistics_rate_reviews.sql

@@ -0,0 +1,20 @@
+SET search_path TO atlas, public;
+
+-- 平台费率审核是系统级事实；证据与复算样本随启用事务一起保存。
+CREATE TABLE logistics_rate_card_reviews (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    rate_card_id UUID NOT NULL UNIQUE REFERENCES logistics_rate_cards(id) ON DELETE RESTRICT,
+    reviewer_user_id UUID NOT NULL REFERENCES users(id) ON DELETE RESTRICT,
+    idempotency_key UUID NOT NULL,
+    request_hash CHAR(64) NOT NULL,
+    rules_hash CHAR(64) NOT NULL,
+    source_reference TEXT NOT NULL CHECK (length(trim(source_reference)) BETWEEN 3 AND 500),
+    review_note TEXT NOT NULL CHECK (length(trim(review_note)) BETWEEN 20 AND 2000),
+    samples JSONB NOT NULL CHECK (jsonb_typeof(samples) = 'array' AND jsonb_array_length(samples) >= 6),
+    effective_from TIMESTAMPTZ NOT NULL,
+    reviewed_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    UNIQUE (reviewer_user_id, idempotency_key)
+);
+
+-- 审核记录不可改写；后续资费变化须建立新费率版本并重新审核。
+REVOKE UPDATE, DELETE ON logistics_rate_card_reviews FROM atlas_app;