there is a very strange bug in the bluesky-pds implementation that prevents blobs with the text `<svg` from being uploaded. it triggers a 500 because the underlying MIME type detection library assumes XML but the provided MIME type does not match. ref: https://github.com/bluesky-social/atproto/issues/3151 gzipping the content lets us upload this without any issues. Signed-off-by: oppiliappan <me@oppi.li>