feat(db): 0000 站点域——sites/site_config_revisions + 唯一约束

drizzle-kit 首个迁移从 0000 起编号（计划文案写 0001，以实际产出为准）。
迁移文件 + meta/_journal.json + snapshot 一并入库。

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

apps/api/drizzle/0000_pale_sumo.sql

@@ -0,0 +1,22 @@
+CREATE TABLE "site_config_revisions" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"site_id" uuid NOT NULL,
+	"version" integer NOT NULL,
+	"data" jsonb NOT NULL,
+	"checksum" text NOT NULL,
+	"created_at" timestamp with time zone DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+CREATE TABLE "sites" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"key" text NOT NULL,
+	"name" text NOT NULL,
+	"default_locale" text NOT NULL,
+	"production_origin" text NOT NULL,
+	"created_at" timestamp with time zone DEFAULT now() NOT NULL,
+	"updated_at" timestamp with time zone DEFAULT now() NOT NULL,
+	CONSTRAINT "sites_key_unique" UNIQUE("key")
+);
+--> statement-breakpoint
+ALTER TABLE "site_config_revisions" ADD CONSTRAINT "site_config_revisions_site_id_sites_id_fk" FOREIGN KEY ("site_id") REFERENCES "public"."sites"("id") ON DELETE no action ON UPDATE no action;--> statement-breakpoint
+CREATE UNIQUE INDEX "site_config_rev_uq" ON "site_config_revisions" USING btree ("site_id","version");

apps/api/drizzle/meta/0000_snapshot.json

@@ -0,0 +1,172 @@
+{
+  "id": "b744b7d5-e0a8-4940-ab52-2c0b46abbb50",
+  "prevId": "00000000-0000-0000-0000-000000000000",
+  "version": "7",
+  "dialect": "postgresql",
+  "tables": {
+    "public.site_config_revisions": {
+      "name": "site_config_revisions",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "site_id": {
+          "name": "site_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "version": {
+          "name": "version",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "data": {
+          "name": "data",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "checksum": {
+          "name": "checksum",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {
+        "site_config_rev_uq": {
+          "name": "site_config_rev_uq",
+          "columns": [
+            {
+              "expression": "site_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            },
+            {
+              "expression": "version",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": true,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        }
+      },
+      "foreignKeys": {
+        "site_config_revisions_site_id_sites_id_fk": {
+          "name": "site_config_revisions_site_id_sites_id_fk",
+          "tableFrom": "site_config_revisions",
+          "tableTo": "sites",
+          "columnsFrom": [
+            "site_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.sites": {
+      "name": "sites",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "key": {
+          "name": "key",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "default_locale": {
+          "name": "default_locale",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "production_origin": {
+          "name": "production_origin",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "sites_key_unique": {
+          "name": "sites_key_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "key"
+          ]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    }
+  },
+  "enums": {},
+  "schemas": {},
+  "sequences": {},
+  "roles": {},
+  "policies": {},
+  "views": {},
+  "_meta": {
+    "columns": {},
+    "schemas": {},
+    "tables": {}
+  }
+}

apps/api/drizzle/meta/_journal.json

@@ -0,0 +1,13 @@
+{
+  "version": "7",
+  "dialect": "postgresql",
+  "entries": [
+    {
+      "idx": 0,
+      "version": "7",
+      "when": 1792494963444,
+      "tag": "0000_pale_sumo",
+      "breakpoints": true
+    }
+  ]
+}

apps/api/src/db/schema.ts

@@ -1,2 +1,21 @@
-// 聚合导出：后续任务（6-12）按域追加 pgTable 定义
+// 聚合导出：Task 6 起按域追加 pgTable 定义（迁移 0001——站点域）
-export {}
+import { pgTable, uuid, text, integer, jsonb, timestamp, uniqueIndex } from 'drizzle-orm/pg-core'
+
+export const sites = pgTable('sites', {
+  id: uuid('id').primaryKey().defaultRandom(),
+  key: text('key').notNull().unique(),
+  name: text('name').notNull(),
+  defaultLocale: text('default_locale').notNull(),
+  productionOrigin: text('production_origin').notNull(),
+  createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
+  updatedAt: timestamp('updated_at', { withTimezone: true }).notNull().defaultNow(),
+})
+
+export const siteConfigRevisions = pgTable('site_config_revisions', {
+  id: uuid('id').primaryKey().defaultRandom(),
+  siteId: uuid('site_id').notNull().references(() => sites.id),
+  version: integer('version').notNull(),
+  data: jsonb('data').notNull(),
+  checksum: text('checksum').notNull(),
+  createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
+}, (t) => [uniqueIndex('site_config_rev_uq').on(t.siteId, t.version)])

tests/integration/db.sites.test.ts

@@ -0,0 +1,26 @@
+// 站点域集成测试：约束在真 PG 上生效（唯一键、复合唯一键）。
+// 简易内联版——Task 13 收敛为公共 helper；本任务只需连库即可（getDb 从 apps/api 源码导入）。
+// 生命周期纪律：随机 key 插入 + finally 清理，可重复运行不残留脏数据。
+import { describe, it, expect } from 'vitest'
+import { getDb } from '../../apps/api/src/db/client.js'
+
+describe('站点域约束', () => {
+  it('sites.key 唯一；site_config_revisions (site_id,version) 唯一', async () => {
+    const db = getDb()
+    const key = `fixture-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`
+    const r = (await db.execute(`insert into sites (id, key, name, default_locale, production_origin)
+      values (gen_random_uuid(), '${key}', 'Fixture', 'en', 'https://fixture.example') returning id`)) as any
+    const siteId = r[0].id
+    try {
+      await expect(db.execute(`insert into sites (id, key, name, default_locale, production_origin)
+        values (gen_random_uuid(), '${key}', 'Dup', 'en', 'https://x.example')`)).rejects.toThrow()
+      await db.execute(`insert into site_config_revisions (id, site_id, version, data, checksum)
+        values (gen_random_uuid(), '${siteId}', 1, '{"a":1}', 'c1')`)
+      await expect(db.execute(`insert into site_config_revisions (id, site_id, version, data, checksum)
+        values (gen_random_uuid(), '${siteId}', 1, '{"a":2}', 'c2')`)).rejects.toThrow()
+    } finally {
+      await db.execute(`delete from site_config_revisions where site_id = '${siteId}'`)
+      await db.execute(`delete from sites where id = '${siteId}'`)
+    }
+  })
+})