EPD Resolve Supplier

Reads epd-products.json, deduplicates suppliers by supplierKey, and calls the Ploutonion organization-identity A2A agent (organizations.findWebsite) for each unique supplier name. Writes epd-suppliers.json with websiteUrl, status, and a small discovery record (confidence, sources). When Ploutonion returns no website (no_match), downstream search uses Environdec and EPD Hub only — never invents a supplier URL.