more sql consolidation [CI SKIP]

internal/tasks/inventorySnapshots.go

@@ -604,15 +604,7 @@ func ensureSnapshotRowID(ctx context.Context, dbConn *sqlx.DB, tableName string)
 				return err
 			}
 		}
-		_, err = dbConn.ExecContext(ctx, fmt.Sprintf(
-			`UPDATE %s SET "RowId" = nextval(pg_get_serial_sequence('%s','RowId')) WHERE "RowId" IS NULL`,
-			tableName, tableName,
-		))
-		if err != nil {
-			errText := strings.ToLower(err.Error())
-			if strings.Contains(errText, "pg_get_serial_sequence") || strings.Contains(errText, "sequence") {
-				return nil
-			}
+		if err := db.BackfillSerialColumn(ctx, dbConn, tableName, "RowId"); err != nil {
 			return err
 		}
 	case "sqlite":