refactor(data): 收口关系表运行时数据源

- 移除已迁移业务 AppData 运行时 fallback，改走领域 API 和关系表快读
- 补齐需求产品负责人、版本计划任务 JSON 和成员 username 回填迁移
- 统一治理字典入口，并补充 AI provider、数据源契约和领域服务测试

Co-Authored-By: Codex GPT-5 <codex@openai.com>

apps/web/lib/product-store-persistence-source.test.ts

@@ -3,11 +3,10 @@ import { readFileSync } from 'node:fs';
 import { join } from 'node:path';
 import test from 'node:test';
 
-test('product store save helper does not swallow AppData save failures', () => {
+test('product store no longer persists product tree through products-overview AppData', () => {
   const source = readFileSync(join(process.cwd(), 'stores/useProductStore.ts'), 'utf8');
 
-  assert.match(
-    source,
-    /async function saveStoredOverview\(data: ProductOverview\[\]\) \{\s+await saveServerData\('products-overview', data\);\s+\}/,
-  );
+  assert.doesNotMatch(source, /loadServerData/);
+  assert.doesNotMatch(source, /saveServerData/);
+  assert.doesNotMatch(source, /products-overview/);
 });