feat: add last keep alive at tracking for scheduler service #8418

Job	Run time
compatibility_e2e_tests (manager)	42m 17s
compatibility_e2e_tests (client)	41m 58s
compatibility_e2e_tests (seed-client)	42m 11s
compatibility_e2e_tests (scheduler)	42m 28s
	2h 48m 54s

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