docs: replace prose placeholders in reproduction steps with executable commands

The audit found ~80 placeholders, and the damaging ones were where the
measuring apparatus itself was prose rather than a command:

  a6  "( curl ... ) & 를 20개 띄우고 wait"  — the 22.2s headline came from this
  a3  "<로그인 반복, sid 를 /tmp/sids 에>"  — the whole RPO measurement
  a3  "<sid 목록>"                          — the control it is compared against
  a5  "<수신 파드IP>"                       — the injection
  a8  writes /tmp/tok, reads /tmp/rt        — self-inconsistent, sent an empty token
  b3  $KC / $RT / $NEW never assigned
  c2  bare kcadm.sh with no kubectl exec
  a1  conntrack tuples written by hand, though the direction flips per restart

Each is now a shell-expandable form: pod IPs from jsonpath, the admin password
from the secret, ids from kcadm --format csv, conntrack tuples derived from
"conntrack -L" with awk rather than transcribed.

Then the rewritten commands were executed against the live cluster, and one
of them failed — the 20-way load generator, written as "kubectl run --rm -i",
lost its output stream twice in a row. That is a trap this series already hit
once, and the rewrite reintroduced it. A-6 now uses a resident probe pod that
collects into a file and is cat-ed once; verified 20/20 lines.

Evidence: docs/evidence/followup/05-command-reproducibility.txt

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

docs/experiment-b6-key-rotation.md

@@ -237,7 +237,7 @@ curl -s -o /dev/null -w '%{http_code}\n' -H "Authorization: Bearer $OLD" http://
 kcadm.sh get components -r keycloak-patterns --fields id,name,providerId
 
 # 5. 제거하고 다시 확인 — 여기서 401 이 나와야 정상이다
-kcadm.sh delete components/<old-id> -r keycloak-patterns
+kcadm.sh delete components/$(kubectl -n keycloak-lab exec keycloak-0 -- /opt/keycloak/bin/kcadm.sh get components -r keycloak-patterns --fields id,name,providerId | grep -B2 '"name" : "rsa-generated"' | grep '"id"' | cut -d'"' -f4) -r keycloak-patterns
 ```
 
 ---