- attach.IsInlineContentType: the shared inline raster list (JPEG, PNG,
GIF, WebP, AVIF), parameters and case ignored, false for empty or
unparsable values
- writeBlob stores Content-Disposition: attachment for every other type,
so a public bucket or CDN makes the browser download HTML, SVG, PDF or
plain text; content_type and thumbnails are unchanged
- driver tests on memblob and fileblob, Postgres-backed Store assertion,
lagoon README and the storage and attachments pages
