v5.13.12

Internal release. No user-facing changes since v5.13.11. (Smoke test + jaz-api skill docs updated to track an upstream Orders change: a sale-quote / purchase-request orderState is now an order+invoice rollup — PARTIALLY_ORDERED while a confirmed order is not yet fully invoiced/billed, then terminal FULLY_INVOICED / FULLY_BILLED; the old FULLY_ORDERED value was retired. Test and documentation accuracy only.)