output_mode=json yields ExecuteQueryWriter does not implement parsed

Hello,

I'm trying to get back a json object when parsing a query via the cli tool, but I'm getting back a
`ExecuteQueryWriter does not implement parsed`
instead.

The same query (which is a dummy query) does work when I pass in `--output_mode=box`

Wondering if this is a known issue or if I'm holding it wrong.

System: macos
Build: 2024.11.1

> In the following example I've named the binary `zetasqlcli`

```shell
[I] ~> zetasqlcli --mode=parse --output_mode=box 'select * from tbl;'
QueryStatement [0-17]
Query [0-17]
Select [0-17]
SelectList [7-8]
SelectColumn [7-8]
Star(*) [7-8]
FromClause [9-17]
TablePathExpression [14-17]
PathExpression [14-17]
Identifier(tbl) [14-17]

[I] ~> zetasqlcli --mode=parse --output_mode=json 'select * from tbl;'
ExecuteQueryWriter does not implement parsed
```

Reproduce the issue with zetasqlcli using --mode=parse and compare --output_mode=box with --output_mode=json for the sample query. Trace the parse-mode CLI output path and determine why JSON receives an ExecuteQueryWriter; done means the JSON command returns the parsed query instead of the error.

Written by the indexing model from the issue text.