feat(ops): WeCom webhook alerts for pay/redeem anomalies

Add outbound group-bot alerts, rate/amount rules, stuck-order cron, HQ test button, and health db/redis checks.

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

server/dukang-api/src/common/alert/alert.constants.ts

@@ -0,0 +1,30 @@
+/** 告警级别 */
+export type AlertLevel = 'P0' | 'P1' | 'P2';
+
+/** 支付 / 核销行为异常阈值（金额单位：元） */
+export const ALERT_THRESHOLDS = {
+  payAmountMinYuan: 1,
+  payAmountMaxYuan: 5000,
+  payAttemptPerMinute: 3,
+  payFailPerMinute: 5,
+  redeemAmountMinYuan: 1,
+  redeemAmountMaxYuan: 1000,
+  redeemAttemptPerMinute: 3,
+  redeemFailPerMinute: 5,
+} as const;
+
+/** Redis 分钟桶计数 TTL（秒） */
+export const ALERT_RATE_BUCKET_TTL_SEC = 120;
+
+/** 默认去重 TTL */
+export const ALERT_DEDUPE_TTL_SEC = 600;
+
+/** 频次类告警去重 TTL（同一分钟桶只推一次） */
+export const ALERT_RATE_DEDUPE_TTL_SEC = 90;
+
+/** 卡住订单扫描 */
+export const ALERT_STUCK_ORDER = {
+  pendingShipHours: 24,
+  inDeliveryHours: 48,
+  sampleLimit: 5,
+} as const;