VED-948: Add completeness checker #830

Job	Run time
deploy-pr-backend / terraform-plan	28s
deploy-pr-backend / terraform-apply	5m 57s
run-e2e-tests (internal-dev) / wait-for-deployment	7s
run-e2e-tests (internal-dev-sandbox) / wait-for-deployment	5m 12s
run-e2e-tests (internal-dev) / e2e-tests	6m 19s
run-e2e-tests (internal-dev-sandbox) / e2e-tests	23s
run-e2e-tests (internal-dev-sandbox) / batch-e2e-tests	-1s
run-e2e-tests (internal-dev) / batch-e2e-tests	1m 24s
	19m 49s

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