fix: reduce orthogonality check threshold

oxford_spires_utils/se3.py

@@ -51,7 +51,7 @@ def is_se3_matrix(se3_matrix):
     valid_last_row = np.allclose(se3_matrix[3], [0, 0, 0, 1])  # chec k the last row
     R = se3_matrix[:3, :3]
     valid_rot_det = np.isclose(np.linalg.det(R), 1.0, atol=1e-6)  # check the rotation matrix
-    valid_orthogonality = np.allclose(R @ R.T, np.eye(3), atol=1e-6)  # check the orthogonality
+    valid_orthogonality = np.allclose(R @ R.T, np.eye(3), atol=1e-5)  # check the orthogonality
     is_valid = valid_shape and valid_last_row and valid_rot_det and valid_orthogonality
     debug_info = {
         "valid_shape": valid_shape,