productos, equivalencias, cross-sell y cantidades

db/migrations/20260119100100_alias_product_mappings.sql

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+-- migrate:up
+
+-- Nueva tabla para mapeos alias -> múltiples productos con score
+create table if not exists alias_product_mappings (
+  tenant_id uuid not null references tenants(id) on delete cascade,
+  alias text not null,
+  woo_product_id integer not null,
+  score numeric(4,2) not null default 1.0,
+  created_at timestamptz not null default now(),
+  primary key (tenant_id, alias, woo_product_id)
+);
+
+create index if not exists alias_product_mappings_alias_idx 
+  on alias_product_mappings(tenant_id, alias);
+
+-- Migrar datos existentes: copiar woo_product_id de product_aliases
+insert into alias_product_mappings (tenant_id, alias, woo_product_id, score)
+select tenant_id, alias, woo_product_id, coalesce(boost, 1.0)
+from product_aliases
+where woo_product_id is not null
+on conflict (tenant_id, alias, woo_product_id) do nothing;
+
+-- migrate:down
+drop table if exists alias_product_mappings;