fix(os-templates): correct qemu-guest-agent runcmd#27
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cloud-init's final stage was failing with exit 5 on every provisioned VM: the runcmd ran 'systemctl start qemu-guest-agent' with no preceding daemon-reload, so systemd hadn't scanned the unit file apt just dropped; and 'systemctl enable' errored on this static (no [Install]) unit, bailing before its implicit reload. With no 'set -e', the last command's exit propagated and marked scripts-user FAILED -> cloud-init status: error. Fix: apt-get update + noninteractive install, daemon-reload, then start (tolerate failure since udev may race activation). Drop the meaningless enable on a static unit. debian-12/13 + ubuntu-2204/2404 (apt), rocky-10 (dnf). Co-Authored-By: Claude <noreply@anthropic.com>
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cloud-init final stage failed exit 5 on every provisioned VM: the qemu-guest-agent runcmd ran 'systemctl start' with no preceding daemon-reload (systemd hadn't scanned the unit apt just dropped), and 'systemctl enable' errored on this static (no [Install]) unit first. Last command's exit propagated -> scripts-user FAILED -> cloud-init status: error.
Fix: apt-get update + noninteractive install, daemon-reload, then start ... || true; drop the meaningless enable. debian-12/13 + ubuntu-2204/2404 (apt), rocky-10 (dnf). Rebases cleanly on main (#24 touched reimage code, not os-templates). Already deployed to prod.
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