Phase 2 of plan.md. Seven node_* tables with atomic device, bandwidth and XP caps,
a transactional job ledger whose lifetime totals survive pruning, clamped donor
settings, and the bandwidth_sharing consent kind. The acceptance service now has
an explicit exclusion list so it can never grant that consent.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
