Address review comments: simplify sccParent, document org-level servi… #16961

Job	Run time
golangci-lint	1m 46s
go-test	3m 34s
go-race	55s
Store event file	4s
go-mod	32s
go-test-integration	35s
golangci-lint-providers / lint	2m 27s
go-auto-approve	0s
	9m 53s

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