fix: MySQL 空闲连接健康检查 + Gunicorn worker 保活，解决广播开才不卡

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

deploy/apply-lag-fix.sh

@@ -16,6 +16,14 @@ sleep 2
 systemctl is-active gunicorn-dianjing.service
 pgrep -cf 'gunicorn.*a_long_dianjing' || true
 
+echo ""
+echo ">>> 安装 worker 保活 cron（空闲后不卡）"
+chmod +x deploy/gunicorn-warmup.sh
+cp deploy/gunicorn-warmup.cron /etc/cron.d/gunicorn-warmup
+chmod 644 /etc/cron.d/gunicorn-warmup
+bash deploy/gunicorn-warmup.sh
+echo "  cron 已安装，每2分钟预热 worker"
+
 echo ""
 echo ">>> 最近慢请求 (rt>=0.5s):"
 grep -a 'hqhd' "$NGINX_LOG" | awk 'match($0,/rt=([0-9.]+)/,a){if(a[1]+0>=0.5)print}' | tail -5

deploy/gunicorn-warmup.cron

@@ -0,0 +1,5 @@
+# 每 2 分钟预热 Gunicorn worker，解决「空闲后第一下卡、有广播/并发反而不卡」
+SHELL=/bin/bash
+PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
+
+*/2 * * * * root /opt/1panel/apps/openresty/nginx/www/sites/43.142.166.152.443/django/deploy/gunicorn-warmup.sh >/dev/null 2>&1

deploy/gunicorn-warmup.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+# 每 2 分钟 ping 一次 Gunicorn，避免 worker/数据库连接空闲后「第一下卡」
+# 安装: cp deploy/gunicorn-warmup.cron /etc/cron.d/gunicorn-warmup && chmod 644 /etc/cron.d/gunicorn-warmup
+
+DJANGO_DIR="/opt/1panel/apps/openresty/nginx/www/sites/43.142.166.152.443/django"
+cd "$DJANGO_DIR"
+
+# 6 个 worker 各打一次，保持连接池温热
+for _ in 1 2 3 4 5 6; do
+  curl -s -o /dev/null --max-time 3 http://127.0.0.1:8001/ &
+done
+wait
+
+# 顺带测一条需连库的轻量配置接口（无需 token 的会 401/404，但会走 Django+MySQL）
+curl -s -o /dev/null --max-time 5 -X POST http://127.0.0.1:8001/hqhd/peizhi/qdpzhq \
+  -H 'Content-Type: application/json' -d '{}' 2>/dev/null || true