Status: IN
The notification delivery pipeline is bounded: double rate checks at send and process time prevent over-delivery even across queue delays, and retry escalation to permanent failure ensures every notification eventually terminates — no notification retries indefinitely or escapes rate control.
complementary boundedness — rate checks bound throughput, retry escalation bounds duration
Depends on (SL): notification-defensive-double-rate-check, retry-escalates-to-permanent-failure