2b9585a9

By: Michael Lynch <git@mtlynch.io>

Generate photo thumbnails during Tinybeans import

Photos now get 350x350 center-cropped JPEG thumbnails during import,
named <uuid>-thumbnail.jpg. Also fixes metadata.json producing a
trailing-dot thumbnailFilename for entries without a ThumbnailPath.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>