unique connections timestamp (#914) #608

Job	Run time
clippy	2m 8s
build	2m 29s
fmt	20s
tests (coverage-point-calculator)	1m 21s
tests (ingest)	1m 51s
tests (coverage-map)	1m 30s
tests (reward-scheduler)	55s
tests (task-manager)	1m 5s
tests-postgres (boost-manager)	3m 25s
tests-postgres (file-store)	2m 19s
tests-postgres (iot-config)	2m 30s
tests-postgres (iot-packet-verifier)	3m 30s
tests-postgres (iot-verifier)	2m 48s
tests-postgres (mobile-config)	2m 17s
tests-postgres (mobile-packet-verifier)	2m 35s
tests-postgres (mobile-verifier)	3m 34s
build-release	0s
	34m 37s

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