pub const ACK_TIMEOUT: Duration;Expand description
v0.7.0 K6 — per-attempt ACK timeout. Receivers MUST return a JSON
body of the form {"status":"ack","correlation_id":"..."} within
this window for the delivery to count as successful. A non-2xx
response, a timeout, or an ACK whose correlation_id doesn’t
match the dispatched id all count as failure and trigger the next
retry. Exposed so the integration tests can pin the wall-clock
expectations.