Move journal entry calculation and creation from the reconcile-ledger
background job into the upsert-sales-summary tx function. Now any save
of a sales summary (job recalculation, admin edit wizard, or manual
touch) automatically creates the journal entry if balanced with all
accounts mapped, or retracts it if conditions no longer hold. Eliminates
the need for a separate upsert-sales-summary-ledger call and the
reconcile ledger pass for sales summaries.
