Add CLI for fetching sp promotions #444

Job	Run time
build	2m 18s
fmt	13s
clippy	2m 8s
tests (coverage-point-calculator)	1m 40s
tests (ingest)	1m 53s
tests (reward-scheduler)	49s
tests (coverage-map)	1m 27s
tests (task-manager)	55s
tests-postgres (boost-manager)	2m 54s
tests-postgres (file-store)	2m 5s
tests-postgres (iot-config)	2m 27s
tests-postgres (iot-packet-verifier)	3m 34s
tests-postgres (iot-verifier)	2m 55s
tests-postgres (mobile-config)	2m 31s
tests-postgres (mobile-packet-verifier)	2m 33s
tests-postgres (mobile-verifier)	3m 2s
build-release	0s
	33m 24s

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