docs: record 1.3.5 release completion and external verification

Merge-time gates, registry artifacts and anonymous page checks for 1.3.5
recorded as a separate finding; the validation finding gains a status
pointer so its historic 'not yet executed' section is not silently stale.
Released main/tag and uploaded artifacts are untouched.

research-wiki/index.md

@@ -1,6 +1,6 @@
 # Research Wiki 索引
 
-> 自动生成，更新时间：2026-09-09 16:49 UTC
+> 自动生成，更新时间：2026-09-09 18:01 UTC
 
 ## design (43)
 
@@ -48,10 +48,11 @@
 - [调用方自定义维度设计(issue #11)](designs/issue11-caller-dimensions.md) `design:issue11-caller-dimensions`
 - [采样参数透传设计(issue #4)](designs/sampling-params.md) `design:sampling-params`
 
-## finding (16)
+## finding (17)
 
 - [1.3.4 推理契约验证与发布准备](findings/2026-09-09-134-thinking-contracts-validation.md) `finding:2026-09-09-134-thinking-contracts-validation`
 - [1.3.5 T2/T3/T4 验收证据：36 列遥测、失败终态、PG 存储兼容与变异矩阵](findings/2026-09-09-135-call-observability-validation.md) `finding:2026-09-09-135-call-observability-validation`
+- [1.3.5 发布完成与外部验收：合并后门、registry 产物与页面亲查](findings/2026-09-09-135-release-completion.md) `finding:2026-09-09-135-release-completion`
 - [2026-07-20-m2-soak-workload](findings/2026-07-20-m2-soak-workload.md) `finding:2026-07-20-m2-soak-workload`
 - [2026-07-21-m25-acceptance](findings/2026-07-21-m25-acceptance.md) `finding:2026-07-21-m25-acceptance`
 - [2026-07-21-p6-soak-baseline](findings/2026-07-21-p6-soak-baseline.md) `finding:2026-07-21-p6-soak-baseline`