90edc9dd

By: Michael Lynch <git@mtlynch.io>

Collapse writeFromFS into convertAndWrite

writeFromFS was convertAndWrite with an identity (io.Copy) converter — the
two functions were identical except for the converter passed. Have
ImportMedia's switch select the converter (with a verbatim-copy closure for
photos) and call convertAndWrite once, removing the duplicated
open/defer-close/WriteConverted block. No behavior change.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>