fix: Correct deployment directory structure in deploy-prod.yml

- Add deployment structure normalization step after tar extraction
- If net10.0 subdirectory exists, move its contents to deployment root
- Create corrected systemd service file (quantengine.service)
- Fixes issue where .NET DLLs were incorrectly placed in net10.0 subdirectory

This ensures compatibility with existing ExecStart path in systemd service:
  ExecStart=/usr/bin/dotnet /path/to/QuantEngine.Web.dll

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

.gitea/workflows/deploy-prod.yml

@@ -215,6 +215,13 @@ jobs:
           tar -xzf quantengine.tar.gz -C "${TARGET_DIR}"
           rm -f quantengine.tar.gz
 
+          # 배포 구조 정규화 (net10.0 디렉토리가 있으면 최상위로 이동)
+          if [ -d "${TARGET_DIR}/net10.0" ]; then
+            echo "Restructuring deployment (moving net10.0 contents to root)..."
+            mv "${TARGET_DIR}/net10.0"/* "${TARGET_DIR}/"
+            rmdir "${TARGET_DIR}/net10.0" || true
+          fi
+
           # 환경 파일 설치
           echo "⚙️  Installing environment configuration..."
           mkdir -p /home/kjh2064/.config

quantengine.service

@@ -0,0 +1,21 @@
+[Unit]
+Description=Quant Engine Web Application (.NET 10)
+After=network.target
+StartLimitIntervalSec=60
+StartLimitBurst=3
+
+[Service]
+Type=simple
+User=kjh2064
+WorkingDirectory=/home/kjh2064/quantengine_active
+ExecStart=/usr/bin/dotnet /home/kjh2064/quantengine_active/QuantEngine.Web.dll
+Restart=on-failure
+RestartSec=10
+SyslogIdentifier=quantengine
+StandardOutput=journal
+StandardError=journal
+Environment="ASPNETCORE_ENVIRONMENT=Production"
+Environment="ASPNETCORE_URLS=http://127.0.0.1:5000"
+
+[Install]
+WantedBy=multi-user.target