New products auto-created at onboarding; `admin overview get` shows update time

Minor Changes

• 7ee9840: Auto-create products at onboarding: onboard apply now reads optional productName/productSlug tags emitted by the discovery agent and performs a lookup-or-create for each distinct product before attaching sources to the right product under the org.

Patch Changes

• 9e3147f: releases admin overview get now shows the overview's most recent update time when it differs from the original generation time, while keeping the release and citation counts in the summary line.