Optimize Redundant SQL Query

### What happened?

The current SQL script contains redundant SELECT COUNT(*) operations during update/delete. This can be optimized to improve performance.

## Current Generated SQL:
```
DECLARE @ROWS_TO_UPDATE int;

SET @ROWS_TO_UPDATE = (SELECT COUNT(*) as cnt_rows_to_update FROM [dbo].[todo] WHERE [dbo].[todo].[id] = @param0);

SELECT COUNT(*) as cnt_rows_to_update FROM [dbo].[todo] WHERE [dbo].[todo].[id] = @param0;

IF @ROWS_TO_UPDATE = 1
BEGIN
UPDATE [dbo].[todo]
SET [dbo].[todo].[position] = @param1, [dbo].[todo].[owner_id] = @param2
OUTPUT Inserted.[id] AS [id], Inserted.[title] AS [title], Inserted.[completed] AS [completed], Inserted.[owner_id] AS [owner_id], Inserted.[position] AS [order]
WHERE [dbo].[todo].[id] = @param0;
END
```

## Proposed Improvement:
Replace the second SELECT COUNT(*) operation with a SELECT @ROWS_TO_UPDATE to avoid redundant querying.

## Optimized Script:

```
DECLARE @ROWS_TO_UPDATE int;

SET @ROWS_TO_UPDATE = (SELECT COUNT(*) as cnt_rows_to_update FROM [dbo].[todo] WHERE [dbo].[todo].[id] = @param0);

SELECT @ROWS_TO_UPDATE as cnt_rows_to_update;

IF @ROWS_TO_UPDATE = 1
BEGIN
UPDATE [dbo].[todo]
SET [dbo].[todo].[position] = @param1, [dbo].[todo].[owner_id] = @param2
OUTPUT Inserted.[id] AS [id], Inserted.[title] AS [title], Inserted.[completed] AS [completed], Inserted.[owner_id] AS [owner_id], Inserted.[position] AS [order]
WHERE [dbo].[todo].[id] = @param0;
END
```

### Version

main

### What database are you using?

Azure SQL

### What hosting model are you using?

_No response_

### Which API approach are you accessing DAB through?

_No response_

### Relevant log output

_No response_

### Code of Conduct

- [x] I agree to follow this project's Code of Conduct

Inizia tracciando la generazione della query di aggiornamento/eliminazione di Azure SQL che produce lo script mostrato. Confronta l’SQL attuale e quello ottimizzato nell’issue, quindi esegui i test pertinenti di generazione delle query, se disponibili; il lavoro è completato quando il numero di righe viene restituito da @ROWS_TO_UPDATE senza una seconda query COUNT(*).

Scritto dal modello di indicizzazione a partire dal testo della issue.