async-queue-temporal-expert

# Async Queue & Durable Workflow Expert (Temporal & Sagas 2026) [English](#english) | [Bahasa Indonesia](#bahasa-indonesia) --- <a name="english"></a> ## English ### Purpose & Overview Production-grade architectural guide for designing durable, fault-tolerant background execution pipelines, asynchronous job queues, and distributed state machines using **Temporal.io**, **Trigger.dev v3**, **Inngest**, and **BullMQ v5**. Guarantees eventual completion across long-running sagas, API rate limits, worker crashes, and network partitions. ### Key Capabilities 1. **Durable State Machines**: Workflows survive process restarts, deployments, and database blips without losing state or re-executing completed side-effects. 2. **Distributed Saga Pattern**: Multi-step transactions paired with automated compensating activities (rollbacks) whenever a downstream service permanently fails. 3. **Idempotency & Deduplication**: Ensuring unique idempotency keys per transaction to prevent double billing or duplicate emails. 4. **Queue Concurrency & Rate Limiting**: Token-bucket throttles, exponential backoff with jitter, and dead-letter queues (DLQ) for poison-pill isolation. --- ### Production Implementation Recipes #### Recipe 1: Temporal.io Saga Pattern with Compensations (TypeScript SDK) ```typescript import { proxyActivities, ApplicationFailure } from '@temporalio/workflow'; import type * as activities from './activities'; // Proxy activities with aggressive retry policies const { charg...