Four laws from finishing the un-shadow, correcting one:
- A book whose files ALL fail to probe never becomes an item, so a disk-vs-DB
folder gap beside `Invalid data` lines is corrupt media, not a lost book. A
format-only ffprobe clears files the scanner rejects — do not trust it.
- `Disc 01`/`CD 1` subfolders are parts of one item (110 of them here, under a
192-track book); the extension census counts them, ABS does not.
- `.cbr`/`.cbz` group like media but `parseComicMetadata` throws `ERAR_BAD_ARCHIVE`,
so those items land media-less: the file, not the scanner.
- Scan completion is a NEW scan uuid; `podman logs --since` is a sliding window
and ages its own evidence out.
- `?force=1` is now recorded as neither discovery nor repair: a forced full
re-scan left item count, path set and media-less count identical.
Verification names the five book folders that need re-acquiring.
Frank
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