feat: complete dashcam catalog ingestion demo

ingestion/migrations/003_manufacturers.sql

@@ -0,0 +1,29 @@
+create table if not exists manufacturers (
+  id uuid primary key default gen_random_uuid(),
+  slug text not null unique,
+  name text not null,
+  trust_status text not null default 'unknown' check (trust_status in ('trusted', 'unknown', 'untrusted')),
+  notes text,
+  created_at timestamptz not null default now(),
+  updated_at timestamptz not null default now()
+);
+
+alter table products add column if not exists manufacturer_id uuid references manufacturers(id) on delete set null;
+
+insert into manufacturers (slug, name)
+select
+  lower(regexp_replace(trim(brand), '[^[:alnum:]]+', '-', 'g')) as slug,
+  brand as name
+from products
+where brand is not null
+on conflict (slug) do update
+set name = excluded.name,
+    updated_at = now();
+
+update products
+set manufacturer_id = manufacturers.id
+from manufacturers
+where products.manufacturer_id is null
+  and manufacturers.slug = lower(regexp_replace(trim(products.brand), '[^[:alnum:]]+', '-', 'g'));
+
+create index if not exists products_manufacturer_id_idx on products(manufacturer_id);