Nexus/docs/audit/2026-06-09-dashboard-24h-fleet-metrics.md

审计 — Dashboard 24h 舰队趋势（B-02）

Changelog: docs/changelog/2026-06-09-dashboard-24h-fleet-metrics.md

变更文件清单

文件	说明
server/utils/fleet_metrics.py	舰队均值聚合
server/infrastructure/database/fleet_metric_repo.py	采样 CRUD + purge
server/background/heartbeat_flush.py	10min 写入样本
server/api/servers.py	fleet-metrics API
server/infrastructure/database/migrations.py	fleet_metric_samples 表
frontend/src/components/dashboard/DashboardFleetTrends.vue	v-sparkline
frontend/src/pages/DashboardPage.vue	挂载趋势卡
tests/test_fleet_metrics.py	单测 + API

Step 3 规则扫描

规则	结论
分层	PASS — API 只读，聚合在 utils/repo
性能	PASS — 7 天约 1k 行；purge 每 flush
静默吞错	PASS — 前端 load 失败显示空状态

Closure

项	结果
test_fleet_metrics.py	passed
npm run type-check	passed

DoD

• design + plan + changelog
• B-02 alignment-plan 待勾选
• 无新 npm 依赖