storage: Add post challenge reading metrics (#228) #204

Job	Run time
ci-lint	17s
build-2k	4m 26s
build-debug	4m 34s
build-forest	4m 28s
build-calibnet	4m 29s
build-mainnet	4m 23s
gen-check	5m 25s
gofmt	20s
lint	3m 14s
setup-params	4s
mod-tidy-check	32s
test (test-itest-curio, ./itests/curio_test.go)	4m 49s
test (test-all, `go list ./... \| grep -v curio/itests`)	3m 6s
test (test-itest-harmonyDB, ./itests/harmonydb_test.go)	3m 23s
test (test-itest-alertnow, ./itests/alertnow_test.go)	2m 56s
	46m 26s

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