cast updated db columns #721

Job	Run time
build	2m 37s
fmt	10s
clippy	2m 26s
tests (coverage-map)	1m 16s
tests (reward-scheduler)	47s
tests (coverage-point-calculator)	1m 22s
tests (ingest)	1m 51s
tests (task-manager)	1m 2s
tests-postgres (boost-manager)	2m 38s
tests-postgres (file-store)	2m 0s
tests-postgres (iot-packet-verifier)	3m 29s
tests-postgres (iot-config)	2m 32s
tests-postgres (iot-verifier)	2m 43s
tests-postgres (mobile-config)	2m 28s
tests-postgres (mobile-packet-verifier)	2m 24s
tests-postgres (mobile-verifier)	2m 58s
build-release	0s
	32m 43s

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