benchmark: use `process.hrtime.bigint()`
Using BigInt may result in better precision than the legacy process.hrtime() we are currently using (as long as the run completes in less than 100 days :)).
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Using BigInt may result in better precision than the legacy process.hrtime() we are currently using (as long as the run completes in less than 100 days :)).