The salvaged loop called wait_for_pending_completions(None) with a fresh
default 600s deadline on every round, and _finalize_single_query then
re-waited the full timeout on the same stuck notify_on_complete child:
a hung child blocked a quiet one-shot 2x-9x longer than before.
One deadline now covers the whole run — the loop passes the remaining
budget each round, stops after draining once a wait times out (a timed-out
process never fires this run), and the finalize pass skips its re-wait
when the loop already consumed the budget.
Regression: test_quiet_notify_loop_shares_one_linger_budget (one wait
call, full budget, on a stuck child).
kshitijk4poor
c429081bcd