digraph techviz {
  graph [rankdir=TB, splines=ortho, nodesep=0.55, ranksep=0.85];
  node [fontname=Helvetica, fontsize=11, margin="0.18,0.12", style="rounded,filled", fillcolor=white, color="#2d4357", penwidth=1.5];
  edge [fontname=Helvetica, fontsize=10, color="#364b5f", penwidth=1.4, arrowsize=0.75];
  n0 [label="롤링 재시작", shape=box, style="rounded,filled"];
  n1 [label="Infinispan sessions 캐시", shape=box, style="rounded,filled"];
  n2 [label="PostgreSQL 세션 행", shape=cylinder, style="rounded,filled"];
  n3 [label="재시작 전 발급한 refresh token", shape=box, style="rounded,filled"];
  n0 -> n1 [label="비운다", style=solid];
  n0 -> n2 [label="건드리지 않는다", style=solid];
  n2 -> n3 [label="세션이 남아 있어 통한다", style=solid];
}