* fix(relay): let the same-cap roll's post-roll verify outlast one DB stall
The verify step's admin reads gave up after three 2 s retries; on 2026-10-07
c18 failed its roll on 503 'no healthy upstream' during a DB stall and was
healthy 16 s later. The step now retries 5xx for up to 60 s, which covers a
stall plus readiness grace and two LB health checks, and still fails a cell
that stays down. 4xx stays final.
* test(relay): surface curl stderr when the verify retry test fails
* fix(relay): retry the post-roll verify reads in bash, since curl 7.81 ignores --retry under --fail-with-body
* fix(relay): never report a stale body after a refused verify read; stop pinning inert curl retry flags
Jinwoo Hong