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/member-password-persistence-source.test.ts

@@ -8,7 +8,7 @@ test('member store save helper does not swallow AppData save failures', () => {
 
   assert.match(
     source,
-    /async function saveStored\(state: \{ departments: Department\[\]; members: Member\[\]; roles: RoleItem\[\]; passwordRule: PasswordRule \}\) \{\s+await saveServerData\('members', state\);\s+\}/,
+    /async function saveStored\(state: MemberConfigState\) \{\s+await saveServerData\('members', \{ departments: state\.departments, members: \[\], roles: state\.roles, passwordRule: state\.passwordRule \}\);\s+\}/,
   );
 });