Cannot cast LINESTRING_3D from Parquet to GEOMETRY

Hello !
I encountered an error when casting LINESTRING_3D to GEOMETRY after reading from a Parquet file.
When I declare a geometry using the GeoArrow style, everything works fine:

```
SELECT [{'x': -122, 'y': 47, 'z': 18},
{'x': -123, 'y': 46, 'z': 17},
{'x': -124, 'y': 45, 'z': 17}]::LINESTRING_3D::GEOMETRY AS geometry
```

However, when I store this geometry as LINESTRING_3D in a Parquet file :
```
COPY(
SELECT [{'x': -122, 'y': 47, 'z': 18},
{'x': -123, 'y': 46, 'z': 17},
{'x': -124, 'y': 45, 'z': 17}]::LINESTRING_3D as geometry
) TO 'test_linestring_3d_float.parquet' (FORMAT 'parquet')
```
And then try to read and cast it to GEOMETRY, I get the following error:

```
SELECT geometry::LINESTRING_3D::GEOMETRY AS geom
FROM read_parquet('test_linestring_3d.parquet')
```

Error message:
_Conversion Error: Unimplemented type for cast (STRUCT(x DOUBLE, y DOUBLE, z DOUBLE)[] -> GEOMETRY)
when casting from source column geometry (Line Number: 1)_

Casting works if I first cast to LINESTRING_2D instead of LINESTRING_3D.

**Additional Observation**
I was able to cast the LINESTRING_3D from Parquet to GEOMETRY by first casting it to STRUCT(x FLOAT, y FLOAT, z FLOAT)[], then to LINESTRING_3D, and finally to GEOMETRY.
Here’s the query that works:
```
SELECT geometry::STRUCT(x FLOAT, y FLOAT, z FLOAT)[]::LINESTRING_3D::GEOMETRY AS geom
FROM read_parquet('test_linestring_3d_float.parquet')
```
This raises two questions:

- Why is it necessary to go through a STRUCT of FLOAT instead of DOUBLE?
- This workaround introduces an extra cast and, if the file is stored as FLOAT, it becomes unreadable by GDAL and QGIS.

It reminds me of a related issue: (https://github.com/duckdb/duckdb-spatial/issues/197)
DuckDB version: 1.4.1
Thanks

Reproduce the reported queries with DuckDB 1.4.1, especially the direct cast from read_parquet's STRUCT(x DOUBLE, y DOUBLE, z DOUBLE)[] to LINESTRING_3D and GEOMETRY. Trace the cast path for the Parquet result and compare it with the FLOAT workaround. Done means the direct DOUBLE-based cast works without an intermediate cast and remains compatible with GDAL and QGIS.

Written by the indexing model from the issue text.