fix(server): release workers when providers stop answering#23854

fix(server): a timed-out final turn start no longer leaves its run starting

fix(opencode): a long compaction no longer times out its turn start

Merge main into fix/issue-16636

fix(server): a timed-out steer is not resent as a follow-up

fix(server): bound provider control calls and contain unanswered starts

fix(server): an unresponsive provider no longer holds every effect worker

test(server): reproduces issue 16636, a wedged provider holds every effect worker