[GH-3143] Implement distributed GeoPandas scale

[jiayuasu]

What changed

• Add GeoSeries.scale and active-geometry delegation from GeoDataFrame.
• Build a distributed diagonal ST_Affine expression with per-row center or centroid origins.
• Support numeric scale factors plus 2D/3D tuple and Shapely Point origins.
• Preserve nulls, typed empty geometries, indexes, CRS, and SRID metadata.
• Add direct regression tests and GeoPandas parity coverage across 2D and 3D geometry families.

Why

This implements #3143 without materializing geometries on the Spark driver. The existing scale functions do not provide both GeoPandas-compatible per-row origins and Z scaling, so the operation is expressed as an affine transform with offsets derived from each origin.

Validation

• 23 passed in the focused GeoPandas scale test suite.
• Repository checks pass for all four changed Python files.

Closes #3143

[Copilot]

Pull request overview

This PR adds a distributed, GeoPandas-compatible scale operation to Sedona’s Spark GeoPandas layer by expressing scaling as a per-row ST_Affine transform (including Z scaling) while delegating GeoDataFrame behavior through the existing active-geometry delegation.

Changes:

• Added GeoSeries.scale(...) implemented via ST_Affine with per-row "center"/"centroid" origins and support for 2D/3D tuple and Shapely Point origins.
• Added GeoDataFrame/GeoSeries base-level delegation entrypoint for .scale(...).
• Added focused regression tests plus GeoPandas parity tests covering 2D/3D families, origins, factor validation, nulls/typed-empties, and metadata preservation.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
python/sedona/spark/geopandas/geoseries.py	Implements distributed GeoSeries.scale using ST_Affine with validated factors/origins and empty-geometry guarding.
python/sedona/spark/geopandas/base.py	Adds .scale(...) delegation via the active geometry column to match GeoPandas GeoDataFrame behavior.
python/tests/geopandas/test_geoseries.py	Adds direct regression/validation tests for factors/origins, 2D/3D behavior, metadata preservation, and delegation.
python/tests/geopandas/test_match_geopandas_series.py	Adds GeoPandas parity tests for 2D/3D scaling across geometry families and origins.

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