Venue Integrity Check (rt-venue-integrity)

The 743 venues in shared-resources/journal-selection/venue-index.tsv were each curated into this repository from their own published guidance, so a venue being in the index is at least evidence that someone looked. The moment an author steps outside it — and journal-match.md's coverage-honesty rule requires saying so rather than forcing a poor fit — this repository has nothing to offer, and that is exactly the moment the risk appears: a solicitation email, a plausible-looking title, an APC, and a paper that becomes uncitable and cannot be resubmitted elsewhere.

This is the check to run before that submission.

First: is it actually outside the index?