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/.techviz/b5-b6-storage-and-keys/spec.json

@@ -56,7 +56,7 @@
       "emphasis": "warning",
       "description": "컨테이너 파일시스템이다.",
       "details": [
-        "appendonlydir 이 만들어졌다 버려진다"
+        "appendonlydir"
       ],
       "evidence": [
         {
@@ -74,7 +74,7 @@
       "emphasis": "warning",
       "description": "죽으면 /data 도 같이 사라진다.",
       "details": [
-        "볼륨이 없으면 여기까지다"
+        "볼륨 없음"
       ],
       "evidence": [
         {
@@ -106,7 +106,7 @@
       "id": "c-d",
       "from": "config",
       "to": "datadir",
-      "label": "AOF 파일을 쓴다",
+      "label": "AOF 기록",
       "kind": "write",
       "evidence": [
         {
@@ -120,7 +120,7 @@
       "id": "d-c",
       "from": "datadir",
       "to": "container",
-      "label": "컨테이너와 함께 죽는다",
+      "label": "컨테이너와 함께 소멸",
       "kind": "blocked",
       "evidence": [
         {
@@ -134,7 +134,7 @@
       "id": "d-v",
       "from": "datadir",
       "to": "volume",
-      "label": "볼륨을 붙여야 남는다",
+      "label": "볼륨 마운트",
       "kind": "write",
       "evidence": [
         {