Different Line Items on the First Invoice in a Recurring Schedule

Support recurring schedules where the first invoice includes additional or different line items compared to every subsequent recurring copy. Common use case: a one-off setup or implementation fee on the first invoice alongside the standard recurring fee, then only the recurring fee on every invoice after that.

Today this requires creating two separate invoices (one for setup + first cycle, one recurring with the next date set in the future). Native support would let users define the whole arrangement on a single recurring schedule.