docs: correct the places where documents contradicted their own evidence

An independent audit found ten documents printing values their evidence files do not contain. C-1 printed a session count of 0 where the evidence says 4, C-2 printed a success readback for a command that exited 1, and A-1 credited the conntrack flush with a split that the timestamps attribute to a pod restart four seconds earlier.

Also measured wal_writer_delay, which A-3 had asserted as matching without ever querying it, relabelled the A-6 control that moved 41 percent, noted A-8's nine-sample resolution, corrected D-1's RTO to the 41 seconds its own timeline shows, and added a correction banner to D-2. Every experiment document now links its evidence files with their real collection times, and the duplicate screenshots are documented as duplicates.

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

docs/experiment-followup-untested-items.md

@@ -247,3 +247,18 @@ sudo certbot renew --force-renewal
 
 **0.2초 간격으로 재는 이유** — 2절에서 1초 간격으로는 전환을 거의 못 잡았다.
 nginx reload 는 그보다 훨씬 짧을 것이므로 해상도를 올려야 한다.
+
+---
+
+## 증거 파일
+
+**증거 수집 시각: 2026-09-04 15:23 – 16:17 KST** (파일 mtime 기준. 문서 상단의 시각 표기는 작성 시점이라 다를 수 있다.)
+
+| 파일 | 종류 |
+|---|---|
+| [`01-d2-forward-upgrade.txt`](evidence/followup/01-d2-forward-upgrade.txt) | 터미널 원문 |
+| [`02-d2-rollback-same-schema.txt`](evidence/followup/02-d2-rollback-same-schema.txt) | 터미널 원문 |
+| [`03-b4-role-propagation.txt`](evidence/followup/03-b4-role-propagation.txt) | 터미널 원문 |
+| [`04-observability-gap.txt`](evidence/followup/04-observability-gap.txt) | 터미널 원문 |
+
+파일별 상세는 [`evidence/followup/README.md`](evidence/followup/README.md).