Even though distribute-rmp gates the submitter, re-validate the
contributor's distribute.users.status here before inserting into
bb.native_articles. A leaked DISTRIBUTE_SHARED_SECRET shouldn't be
enough to bypass the approval system. Falls back to letting the
request through on transient lookup failure (distribute side already
checked).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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