# POS-005 — Architect

## Feature
POS API Phase 1: product search + payment methods.

## Objetivo
Endpoints: GET /pos/products/search, /pos/products/by-ean/:ean, /pos/products/by-sku/:sku. Admin: GET/POST/PATCH /pos/admin/payment-methods.

## Diseño
- Product search: JOIN catalog_product_variants + catalog_products + inventory_stock + pricing_variant_prices + categories + brands
- Payment methods: direct CRUD on pos_payment_methods table
- Auth: requireAnyRole for product routes; requireRole admin for payment method admin
