- Defer Takeout sidecar enrichment until after indexing so its UPDATE
statements actually match rows. Previously it ran first and silently
no-op'd on the very first scan because no files existed in the DB yet.
- Preserve user review decisions across incremental and regroup rescans.
The grouping phase wipes duplicate_groups/duplicate_members, which
also wiped reviewed=1 / is_keeper flags. Now snapshots reviewed groups
by (method, frozenset of member file_ids) before the wipe and re-applies
them to any post-regrouping group whose member set is unchanged.
- Replace 2-hex-char phash bucketing with multi-index pigeonhole
(16 nibble buckets per hash). At threshold=10, the previous bucketing
missed any near-duplicate pair that differed in the first byte, since
they landed in different buckets and were never compared. Caches
imagehash.hex_to_hash() per phash and dedups pair comparisons.
- Rewrite _suggested_keeper_by_resolution: previous implementation had
a dead inner score() function and the lambda was missing the date
tie-breaker (left as a TODO comment). Now picks largest pixels, ties
by file size, then by oldest exif_datetime.
- Filter phash candidates to length(phash)=16 to skip malformed hashes
rather than relying on the silent except in the comparison loop.
- Reject /api/scan/reset while a scan is running. Resetting mid-scan
wiped tables the running scan thread was still writing to.
- Also clears stale 'redundant' file status (not just 'keeper') when
a file no longer appears in any group after regrouping.
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