docs(keycloak-session-store): rewrite the prose and the diagram labels out of AI register

Two things read as machine-written and both are now fixed with the
repository's own tooling.

The diagram labels counted abstractions instead of naming things —
"틀린 예측 5건", "조용한 실패 9건", "로컬 아티팩트 76건". Replaced with what
those actually were, which is also more useful in a drawing:

  틀린 예측 5건        -> A-1 · A-2 · A-6 · B-4 · B-6
  조용한 실패 9건      -> NetworkPolicy · tc · kill · iptables
  로컬 아티팩트 76건   -> 연결수 0 · 50µs
  A층 결론 3건 반전    -> A-1 · A-2 · A-8

The prose was staccato: 30.7 characters average against a 48-75 reference,
45% of sentences under 25 characters, and causal connectives at 4.9 per 100
against a floor of 6. check_prose reported an error for closing six
sentences with 「~것이 ~이다」.

Roughly ninety sentences were rewritten — joining pairs that carry a real
causal or contrastive relation, and varying the joins. The first pass
overcorrected into a new monotony (는데 at 47 occurrences, connectives up to
31.9, above the ceiling), so twenty-three of those were varied into 지만,
-고, em-dashes, or split back apart.

  check_prose      FAIL error 1  ->  OK error 0
  평균 문장 길이    30.7  ->  43.1
  25자 미만 비율    45.4% ->  23.4%
  이유 연결어미     4.9   ->  within range

Two style_profile numbers still read outside the band, and the reason is
worth writing down rather than editing around: the tool counts each image
caption as a sentence, and this document carries 28 diagrams. Excluding
captions and separators the prose is 46.4 characters average with 14.3%
short — inside the reference range. Padding sentences to move the remaining
gap is what CLAUDE.md forbids, so it stops here.

Protected values were checked against source and are unchanged: 153건/149건,
1,872 ms, 20,000 ms, 22.2 초, 2305초, 845361바이트, 8856건, 205.7ms, 106초.
All 28 diagrams still lint clean with no sentence left on any canvas.

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

docs/keycloak-session-store/final/assets/measurement-control/measurement-control.svg

@@ -79,6 +79,6 @@
 <rect class="node-shape kind-process emphasis-warning role-target" data-evidence="607-618" x="280.0" y="387.0" width="150.0" height="71.0" rx="7" />
 <text class="node-label" x="355.0" y="414.0">오보</text>
 <line class="node-detail-divider" x1="294.0" y1="435.0" x2="416.0" y2="435.0" />
-<text class="node-detail" x="296.0" y="452.0">로컬 아티팩트 76건</text>
+<text class="node-detail" x="296.0" y="452.0">연결수 0 · 50µs</text>
 </g>
 </svg>