Capture the full decision trail and chosen approach for making CLIA labs
emailable: why NPI->NPPES (0.3%) and DirectTrust failed, datacenter-IP search
blocking, the $99 B2B-list -> email-domain -> scrape-current-email -> verify
pipeline (durable domain even when the mailbox is stale), hard rules protecting
the warming mail pool, gzip/HTML-only bandwidth optimization, residential proxy
options, the sample-validation gate before committing, what's already built
(harvest, service, order page, email template), and the postcard fallback.
