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/injection-verification/injection-verification.excalidraw

@@ -6,7 +6,7 @@
     {
       "id": "edge-i-v",
       "type": "arrow",
-      "x": 220.0,
+      "x": 356.0,
       "y": 95.5,
       "width": 160.0,
       "height": 0.0,
@@ -66,7 +66,7 @@
     {
       "id": "edge-label-i-v",
       "type": "text",
-      "x": 255.0,
+      "x": 391.0,
       "y": 55.5,
       "width": 90,
       "height": 24,
@@ -105,7 +105,7 @@
     {
       "id": "edge-v-o",
       "type": "arrow",
-      "x": 680.0,
+      "x": 816.0,
       "y": 95.5,
       "width": 160.0,
       "height": 0.0,
@@ -165,7 +165,7 @@
     {
       "id": "edge-label-v-o",
       "type": "text",
-      "x": 715.0,
+      "x": 851.0,
       "y": 55.5,
       "width": 90,
       "height": 24,
@@ -206,7 +206,7 @@
       "type": "rectangle",
       "x": 70.0,
       "y": 60.0,
-      "width": 150.0,
+      "width": 286.0,
       "height": 71.0,
       "angle": 0,
       "strokeColor": "#1e1e1e",
@@ -236,7 +236,7 @@
       "type": "text",
       "x": 80.0,
       "y": 70.0,
-      "width": 130.0,
+      "width": 266.0,
       "height": 51.0,
       "angle": 0,
       "strokeColor": "#1e1e1e",
@@ -262,18 +262,18 @@
       "locked": false,
       "fontSize": 15,
       "fontFamily": 5,
-      "text": "주입 명령\n조용한 실패 9건",
+      "text": "주입 명령\nNetworkPolicy · tc · kill · iptables",
       "textAlign": "center",
       "verticalAlign": "middle",
       "containerId": null,
-      "originalText": "주입 명령\n조용한 실패 9건",
+      "originalText": "주입 명령\nNetworkPolicy · tc · kill · iptables",
       "autoResize": true,
       "lineHeight": 1.25
     },
     {
       "id": "node-verify",
       "type": "rectangle",
-      "x": 380.0,
+      "x": 516.0,
       "y": 60.0,
       "width": 300.0,
       "height": 71.0,
@@ -303,7 +303,7 @@
     {
       "id": "node-label-verify",
       "type": "text",
-      "x": 390.0,
+      "x": 526.0,
       "y": 70.0,
       "width": 280.0,
       "height": 51.0,
@@ -342,7 +342,7 @@
     {
       "id": "node-observe",
       "type": "rectangle",
-      "x": 840.0,
+      "x": 976.0,
       "y": 60.0,
       "width": 150.0,
       "height": 71.0,
@@ -372,7 +372,7 @@
     {
       "id": "node-label-observe",
       "type": "text",
-      "x": 850.0,
+      "x": 986.0,
       "y": 70.0,
       "width": 130.0,
       "height": 51.0,