feat: Forward sizeDifference on update #17977

Job	Run time
changes	10s
php8.1-webdav	42s
php8.4-webdav	1m 24s
php8.3-webdav	1m 20s
php8.2-webdav	1m 28s
files-external-webdav-summary	6s
	5m 10s

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