Migrate exchange backend from Django to Express + Apollo Server + Prisma

Replace Python/Django/Graphene with TypeScript/Express/Apollo Server.
Same 4 endpoints (public/user/team/m2m), same JWT auth.
Prisma replaces Django ORM for Offer/Request/SupplierProfile.
Temporal and Odoo integrations preserved.

src/services/odoo.ts

@@ -0,0 +1,22 @@
+const ODOO_INTERNAL_URL = process.env.ODOO_INTERNAL_URL || 'odoo:8069'
+
+interface Product {
+  uuid: string
+  name: string
+  category_id?: string
+  category_name?: string
+  terminus_schema_id?: string
+}
+
+export async function getProducts(): Promise<Product[]> {
+  try {
+    const res = await fetch(`http://${ODOO_INTERNAL_URL}/fastapi/products/products`, {
+      signal: AbortSignal.timeout(10000),
+    })
+    if (!res.ok) return []
+    return (await res.json()) as Product[]
+  } catch (e) {
+    console.error('Error fetching products from Odoo:', e)
+    return []
+  }
+}