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-a5-asymmetric-partition.md

@@ -318,14 +318,14 @@ JGroups 코디네이터는 **가장 오래된 멤버**다. 분단이 나면
 ssh kc-lab-1 'sudo conntrack -L | grep 7800'
 
 # 2. 수신측 노드의 raw PREROUTING 에 넣는다 (filter 는 CNI 와 경쟁한다)
-ssh kc-lab-1 'sudo iptables -t raw -I PREROUTING 1 -p tcp -d <수신 파드IP> --dport 7800  -j DROP'
-ssh kc-lab-1 'sudo iptables -t raw -I PREROUTING 1 -p tcp -d <수신 파드IP> --dport 57800 -j DROP'
+ssh kc-lab-1 'sudo iptables -t raw -I PREROUTING 1 -p tcp -d $(kubectl -n keycloak-lab get pod keycloak-1 -o jsonpath='{.status.podIP}') --dport 7800  -j DROP'
+ssh kc-lab-1 'sudo iptables -t raw -I PREROUTING 1 -p tcp -d $(kubectl -n keycloak-lab get pod keycloak-1 -o jsonpath='{.status.podIP}') --dport 57800 -j DROP'
 
 # 3. 걸렸는지 카운터로 확인 — 0 이면 해석 금지
 ssh kc-lab-1 'sudo iptables -t raw -L PREROUTING -n -v'
 
 # 4. 양방향으로 하려면 반대 노드에도 (한 방향만으로는 자가 치유된다)
-ssh kc-lab-2 'sudo iptables -t raw -I PREROUTING 1 -p tcp -d <반대 파드IP> --dport 7800 -j DROP'
+ssh kc-lab-2 'sudo iptables -t raw -I PREROUTING 1 -p tcp -d $(kubectl -n keycloak-lab get pod keycloak-0 -o jsonpath='{.status.podIP}') --dport 7800 -j DROP'
 
 # 5. 분단 확인
 kubectl -n keycloak-lab exec deploy/postgres -- psql -U keycloak -d keycloak \