fix: Send binary files via application/octet-stream in boxel-cli sync (CS-11075)#4852

FadhlanR wants to merge 4 commits into

maincardstack/boxel:mainfrom

cs-11075-ensure-that-uploading-binary-files-to-realm-works-reliablycardstack/boxel:cs-11075-ensure-that-uploading-binary-files-to-realm-works-reliablyCopy head branch name to clipboard