docs: M2 第三波收口——报告 22~27 入档挂导航

- 22~26 Flutter 接入五单报告（T2-11~14 + 白名单扩充，flutter 测试 64→272）
- 27 第三波收口总表：demo 数据消亡、四态纪律、埋点端到端贯通、DEBT-1 偿还
- 三次 compose 实测无契约偏差；波内 agent 中断续跑事故记录在案

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

mkdocs.yml

@@ -52,6 +52,12 @@ nav:
           - 19 契约冻结报告: development/iterations/iteration-2/19-contract-freeze-report.md
           - 20 契约一致性测试: development/iterations/iteration-2/20-contract-test-report.md
           - 21 第二波收口: development/iterations/iteration-2/21-wave2-closure.md
+          - 22 pets 数据层: development/iterations/iteration-2/22-pets-feature-datalayer.md
+          - 23 宠物页面接入: development/iterations/iteration-2/23-pets-pages-report.md
+          - 24 埋点白名单 v2: development/iterations/iteration-2/24-event-whitelist-v2.md
+          - 25 体重疫苗模块: development/iterations/iteration-2/25-weights-vaccines-ui-report.md
+          - 26 时间线与提醒页: development/iterations/iteration-2/26-timeline-reminders-report.md
+          - 27 第三波收口: development/iterations/iteration-2/27-wave3-closure.md
   - API:
       - 契约说明: api/index.md
   - 架构: