docs(keycloak-session-store): take the sentences out of the diagram canvases

The skill says drawings carry names and sentences go in <desc> and the
paragraph beside the figure. I put sentences in node details and edge labels
instead, and 27 of the 28 diagrams shipped with prose inside the canvas —
"예측 다섯 개가 틀렸다", "아홉 번 조용히 실패했다", "막혀서 닿지 않는다".

Only label and details render on the canvas; description does not. So every
sentence moved to a noun phrase and the meaning stays in description, which
was already carrying it.

  막혀서 닿지 않는다              -> 차단
  아홉 번 조용히 실패했다         -> 조용한 실패 9건
  예측 다섯 개가 틀렸다           -> 틀린 예측 5건
  로그아웃이 정리하지 않는다      -> 로그아웃 미정리
  볼륨이 없으면 여기까지다        -> 볼륨 없음

Three node labels were sentences too and became names: 세션 스냅샷, 예측
선기록, 대조군 확보.

What stays is what the rules protect — identifiers, commands and measured
values: PRIMARY KEY (client_registration_id, principal_name),
ValidationFailedException: 1 changesets check sum, nginx -t && nginx -s
reload, SET LOCAL synchronous_commit TO OFF. Those are names of things, not
prose about them.

294 canvas strings across 28 diagrams, none matching a sentence ending,
average 11 characters. All 28 still lint clean and re-rendered.

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

docs/keycloak-session-store/final/assets/b2-primary-key-overwrite/b2-primary-key-overwrite.svg

@@ -51,14 +51,14 @@
 </defs>
 <rect class="canvas" width="680" height="555" />
 <polyline class="edge kind-write style-solid emphasis-normal" points="145.0,124.0 145.0,172.0 241.0,172.0 241.0,220.0" data-evidence="370-377" />
-<rect class="edge-label-bg" x="127.0" y="130.0" width="131.9" height="22" rx="3" />
-<text class="edge-label" x="193.0" y="145.0">principal 이름으로 쓴다</text>
+<rect class="edge-label-bg" x="143.8" y="130.0" width="98.4" height="22" rx="3" />
+<text class="edge-label" x="193.0" y="145.0">principal 이름</text>
 <polyline class="edge kind-write style-solid emphasis-normal" points="355.0,124.0 355.0,172.0 259.0,172.0 259.0,220.0" data-evidence="370-377" />
-<rect class="edge-label-bg" x="264.5" y="130.0" width="85.0" height="22" rx="3" />
-<text class="edge-label" x="307.0" y="145.0">같은 키로 덮어쓴다</text>
+<rect class="edge-label-bg" x="261.1" y="130.0" width="91.7" height="22" rx="3" />
+<text class="edge-label" x="307.0" y="145.0">같은 키 · 덮어쓰기</text>
 <polyline class="edge kind-blocked style-solid emphasis-normal" points="250.0,317.0 250.0,365.0 250.0,365.0 250.0,413.0" data-evidence="378-384" />
-<rect class="edge-label-bg" x="218.1" y="351.0" width="111.8" height="22" rx="3" />
-<text class="edge-label" x="274.0" y="366.0">로그아웃이 정리하지 않는다</text>
+<rect class="edge-label-bg" x="238.2" y="351.0" width="71.6" height="22" rx="3" />
+<text class="edge-label" x="274.0" y="366.0">로그아웃 미정리</text>
 <g id="node-s1">
 <rect class="node-shape kind-component emphasis-primary role-source" data-evidence="360-366" x="70.0" y="60.0" width="150.0" height="64.0" rx="7" />
 <text class="node-label" x="145.0" y="90.0">브라우저 A 세션</text>