Switch from p95 to p99
As per @sytses' request: our OKR goals are measured in 99th percentile times, we should prioritise the migration by 99th percentile too.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
As per @sytses' request: our OKR goals are measured in 99th percentile times, we should prioritise the migration by 99th percentile too.