json load failing

[chrishavlin]

Bug summary

fresh 3.10.11 env failing to load a valid json at the schema check:

Reproduction
sample json:

{
  "$schema": "yt-napari_0.2.0.json",
  "datasets": [],
  "timeseries": [
    {
      "file_selection": {
        "directory": "",
        "file_pattern": "enzo_tiny_cosmology/DD????/DD????",
        "file_list": null,
        "file_range": [0, 50, 10]
      },
      "selections": {
        "regions": null,
        "slices": [
          {
            "fields": [
              {
                "field_type": "enzo",
                "field_name": "Density",
                "take_log": true
              }
            ],
            "normal": "x",
            "center": {
              "value": [
                0.5,
                0.5,
                0.5
              ],
              "unit": "code_length"
            },
            "slice_width": {
              "value": 1.0,
              "unit": "code_length"
            },
            "slice_height": {
              "value": 0.5,
              "unit": "code_length"
            },
            "resolution": [
              800,
              800
            ],
            "periodic": false
          }
        ]
      },
      "load_as_stack": true,
      "process_in_parallel": false
    }
  ]
}

the error:

Traceback (most recent call last):
  File "[/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/napari/components/viewer_model.py", line 1205](http://localhost:8888/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/napari/components/viewer_model.py#line=1204), in _open_or_raise_error
    added = self._add_layers_with_plugins(
  File "[/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/napari/components/viewer_model.py", line 1295](http://localhost:8888/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/napari/components/viewer_model.py#line=1294), in _add_layers_with_plugins
    layer_data, hookimpl = read_data_with_plugins(
  File "[/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/napari/plugins/io.py", line 77](http://localhost:8888/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/napari/plugins/io.py#line=76), in read_data_with_plugins
    res = _npe2.read(paths, plugin, stack=stack)
  File "[/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/napari/plugins/_npe2.py", line 63](http://localhost:8888/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/napari/plugins/_npe2.py#line=62), in read
    layer_data, reader = io_utils.read_get_reader(
  File "[/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/npe2/io_utils.py", line 66](http://localhost:8888/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/npe2/io_utils.py#line=65), in read_get_reader
    return _read(
  File "[/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/npe2/io_utils.py", line 167](http://localhost:8888/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/npe2/io_utils.py#line=166), in _read
    read_func = rdr.exec(
  File "[/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/npe2/manifest/contributions/_readers.py", line 51](http://localhost:8888/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/npe2/manifest/contributions/_readers.py#line=50), in exec
    callable_ = super().exec(kwargs=kwargs)
  File "[/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/npe2/manifest/utils.py", line 61](http://localhost:8888/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/npe2/manifest/utils.py#line=60), in exec
    return self.get_callable(reg)(*args, **kwargs)
  File "[/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/yt_napari/_reader.py", line 37](http://localhost:8888/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/yt_napari/_reader.py#line=36), in napari_get_reader
    if path_is_valid(path):
  File "[/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/yt_napari/_reader.py", line 53](http://localhost:8888/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/yt_napari/_reader.py#line=52), in path_is_valid
    return schema_version_is_valid(schema_version)
  File "[/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/yt_napari/schemas/_version_comparison.py", line 20](http://localhost:8888/home/chavlin/.pyenv/versions/3.10.11/envs/ytnapari_310/lib/python3.10/site-packages/yt_napari/schemas/_version_comparison.py#line=19), in schema_version_is_valid
    if schema_version is None or pfx not in schema_version:
TypeError: 'in <string>' requires string as left operand, not ModelPrivateAttr

likely a pydantic issue