[EventSource(Name = "Migrator.MigratedRecordsCounter")]
public sealed class MigratedRecordsCounterSource : EventSource
{
    public static readonly MigratedRecordsCounterSource Log = new();
    private PollingCounter _migratedRecordsCounter;
    private IncrementingPollingCounter _migratedRecordsRateCounter;

    private long _migratedRecordsCount = 0;
}