curl --request GET \
  --url https://agenticadvertising.org/api/brands/registry

{
  "brands": [
    {
      "domain": "acmecorp.com",
      "has_manifest": true,
      "verified": true,
      "brand_name": "Acme Corp",
      "house_domain": "<string>"
    }
  ],
  "stats": {
    "total": 123,
    "hosted": 123,
    "brand_json": 123,
    "community": 123,
    "enriched": 123,
    "houses": 123,
    "sub_brands": 123,
    "with_manifest": 123
  }
}