perf: 反混淆路径并发限流（默认 32） - #1
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- 三张全局查找表改用 ahash::AHashMap（实测 wall ~3% 收益，零成本保留） - 新增并发限流信号量 GATE（SPINYARN_MAX_CONCURRENCY，默认 8）： 无缓存模型下每个在途请求持有一整套版本表（~30MB），限流把峰值内存 钉在 N×单版本，防止突发流量 OOM。默认值依据 LogShare 实际流量 ~1600 RPM × ~150ms/请求 ≈ 稳态并发 4，平时不触发 - 响应体移除 original 字段（breaking：客户端持有原文，大日志响应体减半）， 并消除 handler 中的 content.clone() 内存实测（Termux，1.21.11，232KB 日志）：空闲 ~6MB；8 并发峰值 ~152MB， 突发结束回落 ~23MB；多版本交替请求 RSS 稳定 ~33-36MB，无驻留累积。
qitry
self-requested a review
August 2, 2026 16:40
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改动
并发限流（本 PR 唯一改动）
src/api/deobfuscate.rs新增全局Semaphore（SPINYARN_MAX_CONCURRENCY，默认 32）。无缓存模型下每个在途请求持有一整套版本表（~30MB），不限流时 N 并发 = N×30MB。限流把峰值内存钉死，突发流量时把 OOM 换成短暂排队。
默认值依据：LogShare 实际流量 ~1600 RPM（~27 req/s）× ~150ms/请求 ≈ 稳态并发 16，限 32 平时完全不触发，只在突发时生效。
Review 调整
原 PR 中的以下两项已回退：
original字段：breaking change，客户端暂不能同步适配，保留该字段测试
cargo test：15/15 通过bash test.sh：7/7 通过