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build-golden.sh bootstrap makes /mnt a shared mount and binds it :rslave into the controller container so enrolled data drives (and P3 self-heal remounts) propagate in. Scoped to /mnt (Model A: only felhom-data-namespace mounts). Spike-proven. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>