perf: 并行化 admin 聚合路由并完善前端缓存预取

- gateway: usage detail / provider summary / pool overview / users list 改为 tokio join 并行拉取依赖数据
- usage: interval timeline 支持自动刷新并按查询区间动态展示，取消服务端 120 分钟过滤并在 ScatterChart 统一封顶
- frontend: 新增管理端导航预取工具及 SidebarNav/MainLayout 触发，admin 读接口统一走 cachedRequest 的短期缓存
- dashboard: request detail 支持短 TTL 缓存并在 UsageRecordsTable mousedown 时预取
- data: migrate 测试在 wait_for_postgres 失败时清理子进程，避免遗留

frontend/src/stores/users.ts

@@ -16,12 +16,12 @@ export const useUsersStore = defineStore('users', () => {
   const loading = ref(false)
   const error = ref<string | null>(null)
 
-  async function fetchUsers() {
+  async function fetchUsers(options: { cacheTtlMs?: number } = {}) {
     loading.value = true
     error.value = null
 
     try {
-      users.value = await usersApi.getAllUsers()
+      users.value = await usersApi.getAllUsers(options)
     } catch (err: unknown) {
       error.value = parseApiError(err, '获取用户列表失败')
     } finally {