외부 시퀀스 설계 완료

- 3개 핵심 비즈니스 플로우별 외부 시퀀스 다이어그램 작성
  - 사용자인증플로우.puml: UFR-AUTH-010, UFR-AUTH-020 반영
  - 요금조회플로우.puml: UFR-BILL-010~040 반영
  - 상품변경플로우.puml: UFR-PROD-010~040 반영

- 논리아키텍처와 참여자 완전 일치
- UI/UX 설계서 사용자 플로우 100% 반영
- 클라우드 패턴 적용 (API Gateway, Cache-Aside, Circuit Breaker)
- PlantUML 문법 검사 통과 (mono 테마 적용)

🤖 Generated with [Claude Code](https://claude.ai/code)

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

tools/check-plantuml.ps1

@@ -0,0 +1,66 @@
+param(
+    [Parameter(Mandatory=$false)]
+    [string]$FilePath = "C:\home\workspace\tripgen\design\backend\system\azure-physical-architecture.txt"
+)
+
+Write-Host "=== PlantUML Syntax Checker ===" -ForegroundColor Cyan
+Write-Host "Target file: $FilePath" -ForegroundColor Yellow
+
+# Check if file exists
+if (-not (Test-Path $FilePath)) {
+    Write-Host "❌ File not found: $FilePath" -ForegroundColor Red
+    exit 1
+}
+
+# Execute directly in PowerShell
+$timestamp = Get-Date -Format 'yyyyMMddHHmmss'
+$tempFile = "/tmp/puml_$timestamp.puml"
+
+# Copy file
+Write-Host "`n1. Copying file..." -ForegroundColor Gray
+Write-Host "   Temporary file: $tempFile"
+docker cp $FilePath "plantuml:$tempFile"
+
+if ($LASTEXITCODE -ne 0) {
+    Write-Host "❌ File copy failed" -ForegroundColor Red
+    exit 1
+}
+Write-Host "   ✅ Copy completed" -ForegroundColor Green
+
+# Find JAR file path
+Write-Host "`n2. Looking for PlantUML JAR file..." -ForegroundColor Gray
+$JAR_PATH = docker exec plantuml sh -c "find / -name 'plantuml*.jar' 2>/dev/null | head -1"
+Write-Host "   JAR path: $JAR_PATH"
+Write-Host "   ✅ JAR file confirmed" -ForegroundColor Green
+
+# Syntax check
+Write-Host "`n3. Running syntax check..." -ForegroundColor Gray
+$syntaxOutput = docker exec plantuml sh -c "java -jar $JAR_PATH -checkonly $tempFile 2>&1"
+
+if ($LASTEXITCODE -eq 0) {
+    Write-Host "`n✅ Syntax check passed!" -ForegroundColor Green
+    Write-Host "   No syntax errors found in the diagram." -ForegroundColor Green
+} else {
+    Write-Host "`n❌ Syntax errors detected!" -ForegroundColor Red
+    Write-Host "Error details:" -ForegroundColor Red
+    Write-Host $syntaxOutput -ForegroundColor Yellow
+    
+    # Detailed error check
+    Write-Host "`nAnalyzing detailed errors..." -ForegroundColor Yellow
+    $detailError = docker exec plantuml sh -c "java -jar $JAR_PATH -failfast -v $tempFile 2>&1"
+    $errorLines = $detailError | Select-String "Error line"
+    
+    if ($errorLines) {
+        Write-Host "`n📍 Error locations:" -ForegroundColor Magenta
+        $errorLines | ForEach-Object { 
+            Write-Host "   $($_.Line)" -ForegroundColor Red 
+        }
+    }
+}
+
+# Clean up temporary file
+Write-Host "`n4. Cleaning up temporary files..." -ForegroundColor Gray
+docker exec plantuml sh -c "rm -f $tempFile" 2>$null
+Write-Host "   ✅ Cleanup completed" -ForegroundColor Green
+
+Write-Host "`n=== Check completed ===" -ForegroundColor Cyan