Use internal function to preserve validation

src/tile_mate/tile_model.py

@@ -1,18 +1,13 @@
 import geopandas as gpd
 from pandera import Column, DataFrameSchema
 
-# Add support for GeometryDtype
-pandas_engine.Engine.dtype = staticmethod(
-    lambda dtype: dtype if dtype == gpd.array.GeometryDtype else None
-)
-
 TILE_SCHEMA = DataFrameSchema(
     {
         'tile_id': Column(str, required=True),
         'url': Column(str, required=True),
         'year': Column(int, required=False),
         'temporal_baseline_days': Column(int, required=False),
         'season': Column(str, required=False),
-        'geometry': Column(gpd.array.GeometryDtype, required=True),
+        'geometry': Column("geometry", required=True),
     }
 )