simplify output and stop on invalid kind

internal/report.go

@@ -98,10 +98,11 @@ func BuildReport(ctx context.Context, reader RecordReader, writer ReportWriter,
 		return fmt.Errorf("loading state: %w", err)
 	}
 
-	var buysCount, sellsCount int64
-	var lastTimestamp time.Time
-	progTicker := time.NewTicker(10 * time.Second)
-
+	var (
+		recordsCount  int64
+		lastTimestamp time.Time
+		progTicker    = time.NewTicker(10 * time.Second)
+	)
 	for {
 		select {
 		case <-ctx.Done():
@@ -109,9 +110,7 @@ func BuildReport(ctx context.Context, reader RecordReader, writer ReportWriter,
 		case <-progTicker.C:
 			slog.InfoContext(
 				ctx, "Progress update",
-				slog.Int64("total_records", buysCount+sellsCount),
-				slog.Int64("sell_records", sellsCount),
-				slog.Int64("buy_records", buysCount),
+				slog.Int64("records_count", recordsCount),
 				slog.Time("last_record_timestamp", lastTimestamp),
 			)
 		default:
@@ -128,15 +127,12 @@ func BuildReport(ctx context.Context, reader RecordReader, writer ReportWriter,
 				return err
 			}
 
-			if rec.Kind().Is(KindBuy) {
-				buysCount++
-			} else if rec.Kind().Is(KindSell) {
-				sellsCount++
-			} else if !rec.Kind().Valid() {
+			if !rec.Kind().Valid() {
 				return fmt.Errorf("cannot process Kind(%d)", rec.Kind())
 			}
 
 			lastTimestamp = rec.Timestamp()
+			recordsCount++
 
 			buyQueue, ok := buys[rec.Symbol()]
 			if !ok {