add original exception string to MapcheteIOError

mapchete/io/raster/read.py

@@ -208,9 +208,9 @@ def _empty_array() -> ma.MaskedArray:
                 raise
         except Exception as exception:  # pragma: no cover
             _, _, exc_traceback = sys.exc_info()
-            raise MapcheteIOError(f"failed to read {input_file}").with_traceback(
-                exc_traceback
-            ) from exception
+            raise MapcheteIOError(
+                f"failed to read {input_file} due to a {str(exception)}"
+            ).with_traceback(exc_traceback) from exception
 
 
 def _get_warped_edge_array(

mapchete/io/vector/read.py

@@ -138,7 +138,9 @@ def _gen_features() -> Generator[GeoJSONLikeFeature, None, None]:
         raise
     except Exception as exception:  # pragma: no cover
         _, _, exc_traceback = sys.exc_info()
-        raise MapcheteIOError(exception).with_traceback(exc_traceback) from exception
+        raise MapcheteIOError(
+            f"failed to read {inp} due to a {str(exception)}"
+        ).with_traceback(exc_traceback) from exception
 
 
 def _read_vector_window_from_file(