The tests of an empty or cut cached source or variant now run the
reconciliation pass, as pixa does at startup, before the next request,
and check that it logs a warning naming the file. New tests: the pass
removes an empty variant file without an accounting row instead of
adopting it, and VariantStorage.Store puts a new .meta file in place of
the old one rather than writing into it.
#252
Model: opus-5-5
Failing tests: an empty or half-size cached source must be fetched
again once and then cached whole, an empty or cut cached variant must
be converted again instead of served, and storing a source over a file
of another size must replace it.
#252
Model: opus-5-5
sneak