These scripts are not used by default, because it's not convenient to
extend stock table, but sites with large amount of payment transactions
are advised to customize stock table (by patching `z_create_stock` and
`z_catalog_stock_list` to add:

 * `stock.aggregate_bank_reconciliation_date`, indexing
  `Movement_getSourceAggregateBankReconciliationDate` for source side
  and `Movement_getDestinationAggregateBankReconciliationDate` for
  destination side.
* `stock.aggregate_bank_reconciliation_uid`, indexing
  `Movement_getSourceAggregateBankReconciliationUid` for source side
  and `Movement_getDestinationAggregateBankReconciliationUid` for
  destination side.
* configure `aggregate_bank_reconciliation_date` and
  `stock.aggregate_bank_reconciliation_date` as datetime keys.

These two columns `aggregate_bank_reconciliation_date` and
`aggregate_bank_reconciliation_uid` should have priority over related keys
of the same name (It may be needed to remove the related keys as part of
the customisation)