Issue #8: a single request that burns its full timeout_s also exhausts
stall_window_s, so the retry budget silently never applies. Root cause is
that both budgets charge the same wall-clock time. The design makes the two
budgets orthogonal — real attempts bill the retry budget, everything else
bills the stall budget — which drops the timeout_s / stall_window_s coupling
instead of guarding it with an assembly-time check.
iomgaa
bfe423ddf8