Preserve compound field data backed by unexported field defs in server-side writes#5539

habdelra wants to merge 5 commits into

maincardstack/boxel:mainfrom

cs-12199-containsmany-compound-field-json-object-data-gets-wiped-outcardstack/boxel:cs-12199-containsmany-compound-field-json-object-data-gets-wiped-outCopy head branch name to clipboard