Wayfinder: chart the Shopify headless commerce map

The route from "mozimo.in displays Shopify products" to "mozimo.in sells them",
as a plan with a phase spine and gates, plus the open decision tickets that
still shape it and the evidence they rest on.

- .scratch/shopify-headless-commerce/: plan.md (phases and gates), map.md (the
  wayfinder map), 10 open decision tickets
- CONTEXT.md: Storefront / Theme store / Cart / Parity vocabulary
- docs/adr/0001-0003: Checkout stays Shopify-hosted, one Variant per product,
  the checkout domain stays shop.mozimo.in
- docs/research/ and docs/shopify-catalog-inventory.md: verified store facts,
  the Cart API probe, and the catalogue inventory

Raw Shopify doc scrapes under .scratch/shopify-research/ are ignored: they are
working material, not record.

.scratch/shopify-headless-commerce/issues/06-discount-configuration-check.md

@@ -0,0 +1,20 @@
+# Discount configuration check
+
+`Type:` task
+`Status:` open
+
+Part of [the map](../map.md).
+
+## Question
+
+Does this store run any discounts?
+
+The Storefront API cannot answer this: `discountCodes` and `discountNodes` are not fields on `QueryRoot` at 2026-10, and discount data is only reachable per live Cart. Whether a discount exists is therefore unverifiable from code, and the parity checklist cannot be written without knowing.
+
+Resolve by checking Shopify admin directly: are there active discount codes, automatic discounts, or abandoned-checkout style offers? Do any apply by default at checkout?
+
+Record what exists — codes, types, conditions, expiry — and note which of them a headless Cart would need to reproduce (`cartDiscountCodesUpdate` applies a code, but automatic discounts are Shopify-side).
+
+## Answer
+
+<!-- filled on resolution -->