fix: restore mypy gitignore entries and Transposed doc note

- .gitignore: restore .mypy_cache/ and .dmypy.json since mypy is retained
- monai/transforms/utility/dictionary.py: restore Transposed doc note
  warning about affine not being updated

Signed-off-by: R. Garcia-Dias <rafaelagd@gmail.com>

Author: garciadias

.gitignore

@@ -109,6 +109,10 @@ venv.bak/
 
 # pyrefly cache
 .pyrefly_cache/
+
+# mypy
+.mypy_cache/
+.dmypy.json
 examples/scd_lvsegs.npz
 temp/
 .idea/

monai/transforms/utility/dictionary.py

@@ -636,6 +636,13 @@ def __call__(self, data: Mapping[Hashable, Any]) -> dict[Hashable, Any]:
 class Transposed(MapTransform, InvertibleTransform):
     """
     Dictionary-based wrapper of :py:class:`monai.transforms.Transpose`.
+
+    .. note::
+        This transform does not update the affine matrix in the metadata. As a result,
+        affine-dependent transforms applied after (e.g. :py:class:`monai.transforms.Spacingd`)
+        may produce unexpected results, because the affine no longer corresponds to the
+        transposed data. To reorient medical images in an affine-aware way, use
+        :py:class:`monai.transforms.Orientationd` instead.
     """
 
     backend = Transpose.backend