idsprint regression when selecting leaf indices

[olivhoenen]

Works with IDStools/2.4.1:

$ idsprint -u imas:hdf5?path=/work/imas/shared/imasdb/ITER/3/134173/106#equilibrium/time[100]
17:03:48 INFO     Parsing data dictionary version 3.38.1 @dd_zip.py:89
91.93759781205512

but not anymore with develop (and release candidate for 2.5):

idsprint -u imas:hdf5?path=/work/imas/shared/imasdb/ITER/3/134173/106#equilibrium/time[100]
17:04:58 INFO     Parsing data dictionary version 3.38.1 @dd_zip.py:89
Traceback (most recent call last):
  File "/home/ITER/hoeneno/GIT/IDStools/venv-mpl/bin/idsprint", line 8, in <module>
    sys.exit(idsprint())
             ~~~~~~~~^^
  File "/home/ITER/hoeneno/GIT/IDStools/idstools/scripts/__init__.py", line 59, in idsprint
    _load_script_main("idsprint")()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/ITER/hoeneno/GIT/IDStools/idstools/scripts/__init__.py", line 39, in main
    exec(script_code, namespace)
    ~~~~^^^^^^^^^^^^^^^^^^^^^^^^
  File "<string>", line 779, in <module>
  File "<string>", line 288, in print_tree
  File "/work/imas/opt/EasyBuild/software/Python-bundle-PyPI/2025.07-GCCcore-14.3.0/lib/python3.13/site-packages/rich/console.py", line 1724, in print
    extend(render(renderable, render_options))
    ~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/work/imas/opt/EasyBuild/software/Python-bundle-PyPI/2025.07-GCCcore-14.3.0/lib/python3.13/site-packages/rich/console.py", line 1345, in render
    for render_output in iter_render:
                         ^^^^^^^^^^^
  File "/work/imas/opt/EasyBuild/software/Python-bundle-PyPI/2025.07-GCCcore-14.3.0/lib/python3.13/site-packages/rich/panel.py", line 229, in __rich_console__
    lines = console.render_lines(renderable, child_options, style=style)
  File "/work/imas/opt/EasyBuild/software/Python-bundle-PyPI/2025.07-GCCcore-14.3.0/lib/python3.13/site-packages/rich/console.py", line 1385, in render_lines
    lines = list(
        islice(
    ...<9 lines>...
        )
    )
  File "/work/imas/opt/EasyBuild/software/Python-bundle-PyPI/2025.07-GCCcore-14.3.0/lib/python3.13/site-packages/rich/segment.py", line 305, in split_and_crop_lines
    for segment in segments:
                   ^^^^^^^^
  File "/work/imas/opt/EasyBuild/software/Python-bundle-PyPI/2025.07-GCCcore-14.3.0/lib/python3.13/site-packages/rich/console.py", line 1345, in render
    for render_output in iter_render:
                         ^^^^^^^^^^^
  File "/work/imas/opt/EasyBuild/software/Python-bundle-PyPI/2025.07-GCCcore-14.3.0/lib/python3.13/site-packages/rich/padding.py", line 97, in __rich_console__
    lines = console.render_lines(
        self.renderable, render_options, style=style, pad=True
    )
  File "/work/imas/opt/EasyBuild/software/Python-bundle-PyPI/2025.07-GCCcore-14.3.0/lib/python3.13/site-packages/rich/console.py", line 1385, in render_lines
    lines = list(
        islice(
    ...<9 lines>...
        )
    )
  File "/work/imas/opt/EasyBuild/software/Python-bundle-PyPI/2025.07-GCCcore-14.3.0/lib/python3.13/site-packages/rich/segment.py", line 305, in split_and_crop_lines
    for segment in segments:
                   ^^^^^^^^
  File "/work/imas/opt/EasyBuild/software/Python-bundle-PyPI/2025.07-GCCcore-14.3.0/lib/python3.13/site-packages/rich/console.py", line 1332, in render
    raise errors.NotRenderableError(
    ...<2 lines>...
    )
rich.errors.NotRenderableError: Unable to render np.float64(91.93759781205512); A str, Segment or object with __rich_console__ method is required

I guess this may be related to PR #28 and was missed during the review.