feat(监控): 完善系统监控、登录状态与访问审计能力

backend/app/services/ip_location.py

@@ -9,6 +9,7 @@ import ipaddress
 import logging
 import sys
 from dataclasses import dataclass
+from functools import lru_cache
 from pathlib import Path
 from typing import Optional
 
@@ -125,5 +126,6 @@ class Ip2RegionResolver:
 _resolver = Ip2RegionResolver()
 
 
+@lru_cache(maxsize=8192)
 def resolve_ip_location(ip: str | None) -> IpLocation:
     return _resolver.lookup(ip)