Postmortem of the Linux template deploy/prepare 'no IP' investigation:
separates the three distinct causes (apt index stale from --skip-update,
deploy --force snapshot-chain, wedged host vmnet-dhcpd) and documents the
recovery (restart vmware-networks). Changelog entry summarising the
toolchain, xvfb, --force cleanup and cloud-init seal changes.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
