Fix S2 coordinate conversion validation

[FlorianPfaff]

Summary

• tighten S² coordinate conversion dimensionality assertions so all Cartesian/spherical inputs must actually be 1-D
• fix the optional elevation-to-inclination conversion path to pass azimuth and computed colatitude in the correct order
• add regression coverage for rejected matrix inputs and the elevation map_to_inclination=True path

Validation

• python -m py_compile on the changed implementation and test files in a local scratch copy
• connector compare confirms the PR is limited to src/pyrecest/distributions/hypersphere_subset/abstract_sphere_subset_distribution.py and tests/distributions/test_abstract_sphere_subset_distribution.py

Note: full pytest execution was not possible in the execution sandbox because direct GitHub checkout/install is unavailable; PR CI should run the repository suite.

[github-actions]

✅MegaLinter analysis: Success

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
✅ COPYPASTE	jscpd	yes		no	no	32.35s
✅ PYTHON	black	2	0	0	0	1.67s
✅ PYTHON	isort	2	0	0	0	0.4s
✅ REPOSITORY	checkov	yes		no	no	29.08s
✅ REPOSITORY	gitleaks	yes		no	no	15.92s
✅ REPOSITORY	git_diff	yes		no	no	0.05s
✅ REPOSITORY	secretlint	yes		no	no	15.24s
✅ REPOSITORY	syft	yes		no	no	1.61s
✅ REPOSITORY	trivy-sbom	yes		no	no	4.27s
✅ REPOSITORY	trufflehog	yes		no	no	22.55s

Notices

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