ModeDRGuestLoss now passes restore-time MountOverrides for the two
platform-constant structural binds (mp8 parent, mp9 bootstrap) via the
shared throwaway-volume format helper - without them a customer-archive
restore under the privsep token fails outright ("restoring 'mp8' to bind
mount is only possible for root"). New post-restore step 4d swaps the real
binds in via the host runner (root pct set, one slot per call), deletes the
displaced unusedN volumes (API config PUT; a scoped-token refusal logs the
residue loudly instead of widening privileges), and respects the
committed/launched rollback envelope. Provision passes nil overrides -
byte-identical behavior (regression contract test).
Engine grows an optional HostRunner + StateDir seam (DR refuses up front
without a runner); selftest bring-up wires the ExecRunner + cleans the
scratch mp9 host dir on teardown; proxmox.GuestConfig.Unused() added.
6 new tests incl. C2 mid-swap rollback + C3 older-archive + 403-warn paths.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PSK5g6qYLknKj8u3QAFEr6
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