- Drop IsWalletCurrency (duplicate of IsCurrency); use IsCurrency in WriteAcquireHistory.
- Add comment on first SaveChangesAsync in CommitAsync explaining the two-phase flush.
- Guard WriteAcquireHistory loop with grant.Num == 0 check so synthetic DebitItem post-state ops do not produce history rows.
- Add InventoryHistoryTests.Commit_writes_no_history_row_for_item_debit to lock in the fix.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>