fix: 完善低权限备份恢复与只读部署密钥支持

ops/grain-auto-deploy.service

@@ -14,6 +14,6 @@ NoNewPrivileges=true
 PrivateTmp=true
 ProtectHome=true
 ProtectSystem=strict
-ReadWritePaths=/var/lib/grain-auto-deploy /www/backup/grain-auto-deploy /www/wwwroot/grain.gynhc.com /var/log/grain-auto-deploy.log
+ReadWritePaths=/var/lib/grain-auto-deploy /www/wwwroot/grain.gynhc.com /var/log/grain-auto-deploy.log
 ReadOnlyPaths=/www/wwwroot/grain.gynhc.com/.git /www/wwwroot/grain.gynhc.com/application/database.php /www/wwwroot/grain.gynhc.com/application/config.php /www/wwwroot/grain.gynhc.com/application/extra/site.php
 RestrictSUIDSGID=true