Harden model_analysis_jsons package-data config and add sdist regression test

[ReinerBRO]

Summary

• harden package-data declarations so model_analysis_jsons are included via both pyod and pyod.utils package paths in setup.py
• reinforce source distribution inclusion with graft pyod/utils/model_analysis_jsons in MANIFEST.in
• add a packaging regression test that builds sdist and asserts JSON assets are present in the archive

Why

Issue #642 reports missing model_analysis_jsons files in installed distributions, which breaks auto model selection at runtime.

Validation

• python3 -m pytest pyod/test/test_package_data.py -q
• python3 -m py_compile setup.py

Closes #642

[yzhao062]

Hi @ReinerBRO, thanks for taking the time to look into this and for the regression test idea — that kind of guard is genuinely useful for packaging issues like this one.

A heads-up on timing: we already landed a fix for #642 in commit ad0d103 (Feb 26), which corrected the package_data key and added the recursive-include to MANIFEST.in. So the core bug is resolved on both development and master.

With that in mind, a few notes on the changes here:

setup.py — the second package_data entry under 'pyod'
The existing 'pyod.utils': ['model_analysis_jsons/*.json'] is correct and sufficient. Adding a parallel entry under 'pyod' means two declarations must be kept in sync going forward, and there is no documented case where a build backend would need one form over the other. I would prefer to keep just the single entry to avoid maintenance confusion.

MANIFEST.in — graft directive
The existing recursive-include pyod/utils/model_analysis_jsons *.json already covers the JSON files and is more precise since it filters by extension. graft would pull in any stray non-JSON files that might end up in that directory. Having both for the same path is also a bit confusing for future contributors.

test_package_data.py — the regression test
This is the part I would love to keep. A packaging regression test is a good safeguard. A few suggestions if you would like to revise:

• Consider using python -m build --sdist instead of the deprecated setup.py sdist invocation.
• Testing bdist_wheel as well would be even stronger, since most users install via wheels.
• Adding if __name__ == '__main__': unittest.main() at the bottom would match the convention in all other test files.
• Since building an archive is relatively slow, a skip marker or condition would be helpful so it does not run on every pytest invocation in CI.

Would you be open to submitting a revised PR with just the test (with the above tweaks)? That would be a welcome addition. Thanks again for the contribution!