优化：降低访问日志噪声并增加日志文件轮转

apps/backend/src/middleware/access-log.test.ts

@@ -0,0 +1,15 @@
+import test from 'node:test'
+import assert from 'node:assert/strict'
+
+import { resolveAccessLogLevel } from './access-log.js'
+
+test('resolveAccessLogLevel sends successful reads to debug', () => {
+  assert.equal(resolveAccessLogLevel('GET', 200), 'debug')
+  assert.equal(resolveAccessLogLevel('head', 304), 'debug')
+})
+
+test('resolveAccessLogLevel keeps writes and failures at info', () => {
+  assert.equal(resolveAccessLogLevel('POST', 200), 'info')
+  assert.equal(resolveAccessLogLevel('GET', 404), 'info')
+  assert.equal(resolveAccessLogLevel('GET', 500), 'info')
+})

apps/backend/src/middleware/access-log.ts

@@ -1,5 +1,5 @@
 import type { Request, Response, NextFunction } from 'express'
-import { createRequestId, logInfo } from '../utils/logger.js'
+import { createRequestId, logDebug, logInfo } from '../utils/logger.js'
 
 export function accessLogMiddleware(req: Request, res: Response, next: NextFunction): void {
   const startedAt = Date.now()
@@ -13,7 +13,9 @@ export function accessLogMiddleware(req: Request, res: Response, next: NextFunct
       return
     }
 
-    logInfo('[http/access]', 'request completed', {
+    const writeLog =
+      resolveAccessLogLevel(req.method, res.statusCode) === 'debug' ? logDebug : logInfo
+    writeLog('[http/access]', 'request completed', {
       requestId,
       method: req.method,
       originalUrl: req.originalUrl,
@@ -33,6 +35,18 @@ export function accessLogMiddleware(req: Request, res: Response, next: NextFunct
   next()
 }
 
+export function resolveAccessLogLevel(method: unknown, statusCode: unknown): 'debug' | 'info' {
+  const normalizedMethod = String(method || '')
+    .trim()
+    .toUpperCase()
+  const normalizedStatus = Number(statusCode || 0)
+  return ['GET', 'HEAD'].includes(normalizedMethod) &&
+    normalizedStatus >= 200 &&
+    normalizedStatus < 400
+    ? 'debug'
+    : 'info'
+}
+
 function resolveRequestId(req: Request): string {
   const fromHeader = String(req.headers['x-request-id'] || '').trim()
   return fromHeader || createRequestId('req')