A Desktop self-update hand-off exits the app before the updater runs and can
kill the messaging gateway in those same seconds (#109538), so the updater's
discovery finds no live PID while the one-shot start attestation still
vouches for the dead one. Both Desktop-ownership checks then read "nothing
running" as "nothing to restore" and the bot stayed down until a manual
start.
Consult the attestation non-destructively before Desktop-owned lifecycle
suppresses a cold-start: a vouched-for PID gone without a clean ledger exit
keeps the plan and is restored; no attested death preserves the #76129 skip
unchanged.
ennheng
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