完善生图5.0的功能

backend/internal/postgres/generation_state.go

@@ -51,7 +51,11 @@ func (db *Database) ChargeAndActivateCreation(ctx context.Context, request billi
 	}
 	var posting WalletEntry
 	if !rows.Next() {
+		rowsErr := rows.Err()
 		rows.Close()
+		if rowsErr != nil {
+			return nil, fmt.Errorf("charge and activate generation creation: read wallet: %w", rowsErr)
+		}
 		return nil, fmt.Errorf("charge and activate generation creation: wallet returned no row")
 	}
 	if err := rows.Scan(&posting.LedgerID, &posting.BalanceAfterFen, &posting.BalanceFen, &posting.TotalRechargedFen, &posting.TotalChargedFen, &posting.CreatedAt, &posting.UpdatedAt, &posting.DeltaFen); err != nil {
@@ -79,7 +83,11 @@ func (db *Database) ChargeAndActivateCreation(ctx context.Context, request billi
 		return nil, fmt.Errorf("charge and activate generation creation: activate job: %w", err)
 	}
 	if !activation.Next() {
+		rowsErr := activation.Err()
 		activation.Close()
+		if rowsErr != nil {
+			return nil, fmt.Errorf("charge and activate generation creation: read activation: %w", rowsErr)
+		}
 		return nil, fmt.Errorf("charge and activate generation creation: job is not pending")
 	}
 	var id string