One entry in the tax_breakdown list on a Stripe Tax calculation.
Reachable from LatticeStripe.Tax.Calculation.t/0 as list(t()). Each entry is one
jurisdiction's share of the total, so this is what you sum or display when itemising
tax on an invoice.
:inclusive distinguishes tax added on top of the amount from tax already contained
within it — reading the total without checking it double-counts inclusive tax.
Embedded value struct: fields are additive. Keys Stripe adds later appear under
:extra rather than being dropped, so a new field never breaks decoding.