Luxembourg payroll calculations have been updated with the 2026 rule parameters for contributions, employer costs, general rules, and tax credits. This helps ensure payroll processing remains aligned with the latest Luxembourg requirements for the new year.

Update Luxembourg payroll rule parameters for 2026.

Task-6481735

Forward-Port-Of: odoo/enterprise#130123

Bank statement lines can now automatically reconcile installment-based accounting entries when the system is confident they belong together. This reduces manual reconciliation work and applies payments in the expected installment order, starting with the oldest linked installment.

Moves with installments should be auto reconciled if we're sure the move
is linked to the statement line.

If we are sure that the installments are linked to the statement line
then the installment with the lowest id should be reconciled first.

task-6285410

Forward-Port-Of: odoo/enterprise#131304
Forward-Port-Of: odoo/enterprise#119891