Remove the need to pass a transaction when upserting to known_gaps

Thanks Ian :D

statediff/indexer/database/sql/writer.go

@@ -17,6 +17,7 @@
 package sql
 
 import (
+	"context"
 	"fmt"
 
 	"github.com/ethereum/go-ethereum/common"
@@ -186,14 +187,12 @@ func (w *Writer) upsertStorageCID(tx Tx, storageCID models.StorageNodeModel) err
 	return nil
 }
 
-func (w *Writer) upsertKnownGaps(tx Tx, knownGaps models.KnownGapsModel) error {
-	res, err := tx.Exec(w.db.Context(), w.db.InsertKnownGapsStm(),
+func (w *Writer) upsertKnownGaps(knownGaps models.KnownGapsModel) error {
+	_, err := w.db.Exec(context.Background(), w.db.InsertKnownGapsStm(),
 		knownGaps.StartingBlockNumber, knownGaps.EndingBlockNumber, knownGaps.CheckedOut, knownGaps.ProcessingKey)
 	if err != nil {
 		return fmt.Errorf("error upserting known_gaps entry: %v", err)
 	}
 
-	ret, _ := res.RowsAffected()
-	fmt.Println("Res:", ret)
 	return nil
 }