Async message queues for background processing with automatic retries, batching, and dead letter queue support.

• Supports producer and consumer patterns with configurable batching (1-100 messages), timeouts (0-60s), and retry policies (0-100 retries) across 10,000 queues per account
• Handles non-idempotent operations safely through explicit message acknowledgement; prevents duplicate writes and data loss with dead letter queue configuration
• Processes up to 5,000 messages/second per queue with auto-scaling concurrency (up to 250 concurrent invocations) and 128 KB message size limit
• Includes HTTP publishing API (May 2025+) for external services, event subscriptions from R2/KV/AI (August 2025+), and pause/purge management commands
• Prevents 13 documented issues including multi-dev queue isolation, remote binding conflicts, and DLQ data loss scenarios