Put and PutFile added the blob size to s.total before writing, and only the
writeFile and os.Rename failure paths released it. A writeMeta failure in
either, and a chmod failure on the spool in PutFile, kept the size, so a store
that hit a full disk over-counted itself and could answer ErrStoreFull while
the disk had room until the next Open re-measured.
One defer per function now owns the release, disarmed on the success return,
so a future early return cannot reintroduce the leak.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
claude
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