raystack / frontier / 11763122979

Pull #796

github

feat: generate invoice for overdraft credits

It's necessary to configure the product name to calculate
per unit price before the overdraft credits can be invoiced
in `billing.customer.credit_overdraft_product`.
If not set, invoice reconcilation and creation is skipped.

If there is already an invoice for overdraft credits for same
time range, no new invoice will be created for that customer.
Currently the system generates them on the first day of the month.

Reconcilation of these invoice happens on same cadence as
invoices gets synced from the billing provider.

Signed-off-by: Kush Sharma <thekushsharma@gmail.com>

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