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/** L1 幂等缓存 TTL：
export const L1_TTL_SECONDS = 86 _400 ;
/** L2 热缓存基础 TTL：
export const L2_TTL_BASE_SECONDS = 180 ;
/** L2 TTL 随机抖动上限：
export const L2_TTL_JITTER_MAX_SECONDS = 30 ;
/** L3 stale 缓存 TTL：
export const L3_TTL_SECONDS = 1 _800 ;
/** 缓存击穿锁 TTL：
export const LOCK_TTL_SECONDS = 5 ;
/** 未获锁时等待后重读 L2 的毫秒数 */
export const LOCK_WAIT_MS = 2 _000 ;
/** 单客户限流：
export const CUSTOMER_RATE_LIMIT = 60 ;
/** 客户限流窗口：
export const CUSTOMER_RATE_WINDOW_SECONDS = 60 ;
/** 单 IP 限流：
export const IP_RATE_LIMIT = 1 _000 ;
/** IP 限流窗口：
export const IP_RATE_WINDOW_SECONDS = 60 ;
/** IP 封禁时长：
export const IP_BAN_TTL_SECONDS = 600 ;
/** RPA 熔断状态 TTL：
export const CIRCUIT_TTL_SECONDS = 600 ;
/** 连续 RPA 失败次数阈值，达到后熔断 */
export const CIRCUIT_FAILURE_THRESHOLD = 3 ;
