[AIT-681] Compute fork metadata for edits via `useChat` #42

Job	Run time
check	46s
demo demo/vercel/react/use-client-transport	1m 32s
demo demo/vercel/react/use-chat	1m 32s
test node 20	44s
test-integration node 24	1m 3s
test-integration node 22	1m 9s
test node 22	44s
test node 24	44s
build	44s
test-integration node 20	1m 9s
	10m 7s

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