Missing circuit breaker causes cascading failures during chronic outages

Dramatiq lacks built-in circuit breaker, causing failures on chronic outages when error rate reaches 5%. System continues attempting tasks against failing dependencies without protection, wasting resources and delaying recovery.

Implement Hystrix-like circuit breaker middleware tracking failure ratio. Configure to open circuit after 10 consecutive failures. In open state, pause queue for 60 seconds before attempting half-open state. Track consecutive_fails metric to trigger circuit breaker.