Extracts vendor name, tax ID, line items, net subtotal, VAT rates and payment details (IBAN, BIC) from an invoice image (PNG or JPEG, a public https URL or base64, up to 4 MB) sent straight to a Cloudflare Workers AI vision model. Model output is parsed as JSON and checked for the expected keys; unparseable output is an error, not a guess. Requires the env.AI binding.