A one-shot Maintenance action to remove the blurred locked-preview images
the ingester downloaded from tier-gated Patreon posts before #874.
current_user_can_view was never persisted, so the cleanup re-walks each
enabled Patreon source (read-only) to re-derive which posts are gated now
and the blurred filehashes Patreon serves for them, then matches by
CONTENT HASH against stored source_filehash. Because the hash is
content-addressed, a real file downloaded when access existed has a
different hash and can never match — regained-then-lost-access content is
provably spared (operator's hard requirement). NULL source_filehash =>
unverifiable, kept + reported.
On apply: delete matched ImageRecords + files (provenance cascades),
clear seen/dead-letter ledger rows for those hashes so the real media
re-ingests if access returns, and delete gated posts left bare. Shares
one match predicate between preview and apply (rule 93).
- cleanup_service: collect_gated_previews + purge_gated_previews
- tasks.admin: purge_gated_previews_task (async re-walk bridge, timeboxed)
- api.admin: POST /maintenance/purge-gated-previews
- GatedPurgeCard.vue in Settings > Maintenance (preview -> confirm -> apply)
- tests: collect predicate, hash-match delete/spare/unverifiable, ledger
clear, bare-post removal, no-op
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
bvandeusen
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