Briefer fails to run queries that have no return.

### Steps to reproduce:

1. Create a SQL block
2. Choose `DuckDB` as the datasource
3. Run this query `CREATE TABLE test AS SELECT 1;`


This probably happens for all the datasources, DuckDB is just the easier one to use to reproduce it.

First reported at #78

Start with the SQL block execution path for DuckDB and review the related report in issue #78. Reproduce `CREATE TABLE test AS SELECT 1;` and compare it with a query that returns rows; done means the no-return query executes successfully without the Briefer run failing.

Written by the indexing model from the issue text.