storage: Add post challenge reading metrics #67

Job	Run time
ci-lint	18s
build-debug	4m 18s
build-2k	4m 20s
build-calibnet	4m 32s
setup-params	5s
build-forest	4m 56s
build-mainnet	4m 15s
gen-check	5m 29s
gofmt	17s
lint	3m 4s
mod-tidy-check	35s
test (test-itest-curio, ./itests/curio_test.go)	4m 32s
test (test-all, `go list ./... \| grep -v curio/itests`)	1m 41s
test (test-itest-harmonyDB, ./itests/harmonydb_test.go)	2m 22s
test (test-itest-alertnow, ./itests/alertnow_test.go)	1m 32s
	42m 16s

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