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/xiaobao-v22-summary.ts

@@ -25,7 +25,7 @@ const RISK_LEVELS = new Set<XiaobaoRiskLevel>(['on_track', 'attention', 'at_risk
 const REASON_SEVERITIES = new Set<RiskReason['severity']>(['info', 'warning', 'danger']);
 const SILENT_RISK_ITEM_TYPES = new Set<NonNullable<SilentRisk['itemType']>>(['dev_task', 'test_case', 'bug', 'version']);
 
-export function shouldLoadXiaobaoAppDataFallback(state: V22XiaobaoSummaryLoadState): boolean {
+export function shouldLoadXiaobaoStoreFallback(state: V22XiaobaoSummaryLoadState): boolean {
   return state === 'empty' || state === 'failed';
 }