Fixed — uploading a local image to Braze now works

What shipped

• •Fixed — orbit_upload_image_to_braze now uploads local files (file_path) and raw base64 data (image_data_base64) successfully and returns a hosted CDN URL. The 0.21.2 attempt addressed the wrong cause; this corrects the upload itself by sending the file as a binary upload rather than base64 in a JSON body.
• •Fixed — orbit_upload_images_to_braze, the bulk path used when hosting images for a generated email, uploads local images the same way.
• •Fixed — hosting local image assets while learning or syncing a Braze master template now works too.
• •Stripo emails unblocked end to end — hosting a local image with orbit_upload_image_to_braze and passing its URL into an orbit_compose_stripo_email image slot now works, since that first upload step finally succeeds for local files.