gall: don't crash on suspended agent build failures
::
?> ?=([%cor @ @ @ @ ~] wire)
=/ [dap=term her=@ta desk=@ta dat=@ta ~] t.wire
+ =/ yak (~(get by yokes.state) dap)
+ ?: &(?=(^ yak) !-.agent.u.yak)
+ ~> %slog.0^leaf/"gall: received core for suspended agent {<dap>}"
+ mo-core
=/ =beak [(slav %p her) desk da+now]
?> ?=([?(%behn %clay) %writ *] sign-arvo)
?~ p.sign-arvo
