Pure diff of the user's notes against their bucket contents: reconcileStorage
returns MISSING (an active hosted note whose primary video file is absent) and
ORPHAN keys (bucket objects no live note references — including a deleted video's
leftover file, the "deleted on Nostr but still in the bucket" case). Safety
guarantees: a file an active note still uses, plus its sibling .torrent and
thumbnail, is never reported as an orphan; a missing sibling does not mark a row
missing (only a missing primary video file does); external-URL videos can't be
"missing" but unrelated bucket files are still orphans.
Tests + mutation-verified: orphan = present minus referenced (not all present),
and the missing-primary check, are both independently guarded.
Build + full lint green. Next: r2Service.listVideoStorageObjects + wiring.
Co-Authored-By: Claude Opus 4.8 <[email protected]>