Deletes a member's messages server-wide the moment they leave, are kicked,
or are banned (all fire on_member_remove; audit log classifies which).
Generates a self-contained HTML report with channel-switching, search, and
attachment previews, alongside per-guild config for triggers, exemptions,
scan scope, dry-run mode, and report retention.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
