* test(integration): wait on the right signal in five flaky integration contracts
The Prometheus shared-label tests waited for the latency metric and then read the
request counter, which the logger writes after an await. They now wait for the counter
The auto-router session poll returned on the first 200 while the caller expected two
turns, so it now waits for the expected turn count
The S3 queue cap test let its failing sink recover on a 15s clock that could expire
mid-flush. The sink now stays down until a flush fails after every event is queued
K3 normally takes 168-175s against a 180s limit, so the limit is now 300s
The MCP env var browser spec reused an idle keep-alive socket that the proxy closes
after 5s, so its API calls now send Connection: close
* test(integration): add until_asserted so a wait polls the exact asserts it guards
eventually() takes a predicate separate from the asserts that follow it, which lets a
test wait on one value and then assert on another written later. until_asserted reruns
a block of asserts until they all pass and re-raises the last failure on timeout
The Prometheus shared-label tests and the auto-router session check now use it
