Suparch v0.2.1
Restores iHerb as Suparch's primary product source.
- removes the standalone NIH DSLD catalog publication path
- adds conservative iHerb sitemap discovery and robots-aware fetching
- requires authorized iHerb-backed catalogs for Hub deployment
- adds GTIN-validated UPC enrichment while preserving iHerb identity
- rejects non-supplement pages without Supplement Facts
- keeps the public MCP runtime read-only