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docs: document awaiting the winning task's result on a duplicate (#87)

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2026-07-29 10:41:26 +02:00
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@@ -51,6 +51,7 @@ except DuplicateTaskError:
## Features
- **Sender-side deduplication** — rejects duplicate tasks at dispatch time via a Redis lock, before they reach the broker.
- **Handle to the winning task** — a rejected caller gets the winner's `task_id` on the error, so it can await the winner's result instead of re-kicking.
- **Atomic lock release** — lock is released on completion or error via a Lua check-and-delete; only the owning task can release its lock.
- **Configurable TTL** — set a global default or override per task with the `deduplication_ttl` label.
- **Lock heartbeat** — a background task re-extends the lock TTL while the task runs, so long-running tasks keep their lock instead of expiring mid-execution and admitting a duplicate.