fix(contracts): 守卫收紧必填字段类型与对象形状；修复包级 test 脚本；补齐守卫测试与 REQUIRED 类型锁

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

packages/contracts/src/universal-row.ts

@@ -20,17 +20,22 @@ export interface UniversalRow {
   rawLocation: string
 }
 
-const REQUIRED: (keyof UniversalRow)[] = [
+type RequiredKeys<T> = { [K in keyof T]-?: {} extends Pick<T, K> ? never : K }[keyof T]
+
+// 契约冻结：REQUIRED = 接口必填字段全集；接口新增必填字段而列表漏改 → 编译报错
+const REQUIRED = [
   'sourceType', 'sourceId', 'status', 'locale',
   'taxonomyRefs', 'attachmentRefs', 'seo', 'knownFields', 'extras', 'rawLocation',
-]
+] as const
+
+type _RequiredKeysMatch = [RequiredKeys<UniversalRow>] extends [typeof REQUIRED[number]] ? true : never
+const _requiredKeysComplete: _RequiredKeysMatch = true
 
 export function isUniversalRow(v: unknown): v is UniversalRow {
   if (typeof v !== 'object' || v === null) return false
   const row = v as Record<string, unknown>
   return REQUIRED.every((k) => k in row)
     && Array.isArray(row.taxonomyRefs) && Array.isArray(row.attachmentRefs)
-    && row.seo !== null && typeof row.seo === 'object'
-    && row.knownFields !== null && typeof row.knownFields === 'object'
-    && row.extras !== null && typeof row.extras === 'object'
+    && ['sourceType','sourceId','status','locale','rawLocation'].every((k) => typeof row[k] === 'string')
+    && [row.seo, row.knownFields, row.extras].every((x) => typeof x === 'object' && x !== null && !Array.isArray(x))
 }