added flush log backup tasks #7267

Job	Run time
check-file-encoding	7s
check-control-characters	11s
check-git-conflicts	7s
check-manual-line-breaks	9s
check-unclosed-tags	11s
markdownlint	21s
verify-internal-link-anchors	16s
verify-internal-links	1m 19s
	2m 41s

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