fix(backend): уменьшить лишние записи SQLite

Убрать WAL TRUNCATE с hot path NetFlow, не писать неизменённые UPDATE
и служебные INSERT, кэшировать карты topology/analytics.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/routes/sidebar-counts.ts

@@ -1,4 +1,5 @@
 import type { FastifyPluginAsyncZod } from "@fastify/type-provider-zod"
+import { count } from "drizzle-orm"
 import { listCertificatesFromServers } from "../services/certificates-service.js"
 import { countWireGuardInterfaces } from "../services/wireguard-live.js"
 import { db } from "../db/index.js"
@@ -11,27 +12,22 @@ import {
 } from "../db/schema.js"
 import { listUsers } from "../modules/users/service/users-service.js"
 
+function tableCount(table: typeof servers | typeof filterRules | typeof uptimeProbes | typeof uptimeSpeedProbes | typeof recursiveRoutes): number {
+  return db.select({ n: count() }).from(table).all()[0]?.n ?? 0
+}
+
 const sidebarCountsRoutes: FastifyPluginAsyncZod = async (app) => {
   app.get("/sidebar-counts", async (_req, reply) => {
-    const [
-      serversTotal,
-      filterRulesTotal,
-      uptimeProbesTotal,
-      uptimeSpeedProbesTotal,
-      recursiveRoutesTotal,
-      certificatesTotal,
-      wireguardTotal,
-      usersTotal,
-    ] = await Promise.all([
-      Promise.resolve(db.select().from(servers).all().length),
-      Promise.resolve(db.select().from(filterRules).all().length),
-      Promise.resolve(db.select().from(uptimeProbes).all().length),
-      Promise.resolve(db.select().from(uptimeSpeedProbes).all().length),
-      Promise.resolve(db.select().from(recursiveRoutes).all().length),
+    const serversTotal = tableCount(servers)
+    const filterRulesTotal = tableCount(filterRules)
+    const uptimeProbesTotal = tableCount(uptimeProbes)
+    const uptimeSpeedProbesTotal = tableCount(uptimeSpeedProbes)
+    const recursiveRoutesTotal = tableCount(recursiveRoutes)
+    const [certificatesTotal, wireguardTotal] = await Promise.all([
       listCertificatesFromServers().then((res) => res.certificates.length),
       countWireGuardInterfaces().catch(() => 0),
-      Promise.resolve(listUsers().length),
     ])
+    const usersTotal = listUsers().length
 
     return reply.send({
       servers: serversTotal,