sneak
a256b83734
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Handle every error return flagged by golangci-lint's errcheck rather than discarding it: - run.go: add a cleanup() helper that logs a warning (and ignores ErrNotExist) when removing a temp file fails, so leaked scratch files are surfaced; use it for all best-effort removals. - copy.go / extract.go: log a warning on deferred Close() failures for the source file, destination DB, and result-set rows. - extract.go: on the rollback path, ignore the benign sql.ErrTxDone (already committed) and log any other rollback failure. - verify.go: add killCat() which ignores os.ErrProcessDone (zstdcat already exited via SIGPIPE) and logs any unexpected kill failure. make check is clean (0 lint issues, tests pass).