An engine crash re-parented its dinov2-embed child (still holding VRAM)
and the respawned engine stacked a second copy — the child now gets
PR_SET_PDEATHSIG (dies with the engine) and stale orphans for the same
model are reaped before spawn.

Engines-card footprints: a model loaded onto an already-full card
measures a ~0 VRAM delta and reported "0.01 GB" — report
max(measured, config estimate) instead.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014S8VtAvG499SsCbeESRK7V