Startup convergence: re-invoke the reclaim verb, and boot before a resumed hibernate

[tonicmuroq]

Fault-injection follow-up to #55/#56/#57, both reproduced on a real node.

watchBusyCreate only called Runtime.Inspect. A creating record reads the same
whether its owner is still cloning or died holding the name, so a clone whose
owner was SIGKILLed was never reclaimed: the loop polled until the 30-minute
budget expired while every CreatePod retry failed on reserve VM record: vm name ... already exists. The verb is the only thing that tells those apart, so
the loop now re-invokes it each tick, short-circuiting on collected/not-found.
It stays additive: a record that reaches running is still adopted whatever the
verb answers, so a verb that keeps failing cannot strand a committed clone.
The Inspect classification is now shared with reconcileStaleCreates.

dispatchResume gated its Start on the VM state carried in the startup List
snapshot. That is a stored record field, and it does not reliably describe
liveness -- runningVMClientWithRecord's pid %d not cloud-hypervisor branch is
only reachable when the record still reads running, so a hibernate owed on a VM
whose VMM had been killed could skip the boot and then fail every step with
vm is not running. Start is idempotent (PrepareStart no-ops on a live VM and
converges a crashed one via convergeCrashedStart), so it is now unconditional.

Verified on a testbed node:

• kill -KILL vk with cocoon vm clone in flight, RestartSec shortened so vk is
  back while the orphaned child still holds the name: stale_create_reconcile
  goes busy=2 -> collected=1 and the record resolves in 6s, where the old build
  logged busy once and then went quiet for the full budget.
• stop vk mid-hibernate then SIGKILL the VMM: startup_resume_total{hibernate}=1,
  the VM boots, and the hibernate completes (netresize/snapshot/push/remove all
  ok). A marker file written into the guest before each hibernate was present
  after every wake, so no guest state was lost on either path.

Closes part of #58.