chore(bootstrap): 监控阈值降至 80% + 关闭正常心跳(仅异常告警)

CPU/MEM/DISK 阈值 90/90/85 → 统一 80;MONITOR_SEND_OK_PULSE true → false
(默认只在异常时推送,正常不打扰)。同步 init.sh 默认值与 bootstrap.env.example。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

deploy/bootstrap/init.sh

@@ -35,12 +35,12 @@ TELEGRAM_BOT_TOKEN=""
 TELEGRAM_CHAT_ID=""
 NODE_NAME="$(hostname)"
 MONITOR_INTERVAL_MIN=5
-CPU_ALERT_PCT=90
-MEM_ALERT_PCT=90
-DISK_ALERT_PCT=85
+CPU_ALERT_PCT=80
+MEM_ALERT_PCT=80
+DISK_ALERT_PCT=80
 MONITOR_UNITS="sing-box pangolin-agent"
 MONITOR_NET_PROBE="https://www.cloudflare.com/cdn-cgi/trace"
-MONITOR_SEND_OK_PULSE=true
+MONITOR_SEND_OK_PULSE=false
 
 if [ -f "$SCRIPT_DIR/bootstrap.env" ]; then
   log "读取配置 $SCRIPT_DIR/bootstrap.env"