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* fix 11388 * fix(volume): scrub validates local deletion tombstones TombstoneFileSize (-1) is an .idx-only sentinel; the physical record it points at carries a zero-sized body. Normalize deleted index sizes to 0 via onDiskSize before computing disk usage and calling ReadData, so corrupted or truncated tombstone records are detected instead of skipped. Offset-zero entries (remote logical deletes, no .dat record) remain skipped, and the physical needle id is checked against the index key. Mirror the behavior in the Rust volume server. * fix(volume): scrub preserves physical size of deleted non-tombstone entries Size.Raw()/raw() already encodes the index-to-disk mapping: tombstone (-1) -> 0, other negative sizes -> their absolute value (the offset then points at the original record, per the ReadDeleted path). Use it instead of mapping every deleted size to 0. --------- Co-authored-by: Chris Lu <chris.lu@gmail.com>