Fix beartype crash in pytest_collection_modifyitems on Windows

[adamtheturtle]

Summary

• The pytest_collection_modifyitems hook in tests/mock_vws/fixtures/vuforia_backends.py typed items as list[pytest.Function], but Sybil doctest items (SybilItem) don't inherit from Function
• The @beartype decorator enforced this at runtime, causing a BeartypeCallHintParamViolation that crashed the Windows CI
• Changed the type hint to list[pytest.Item] (matching the same hook in conftest.py)

Test plan

• All pre-commit hooks pass (mypy, pyright, ty, pyrefly, ruff, etc.)
• Windows CI passes

🤖 Generated with Claude Code

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Note

Low Risk
Low risk: a type-hint-only change to a pytest hook signature that affects runtime only via beartype and does not alter test behavior beyond avoiding collection-time crashes.

Overview
Prevents a test-collection crash by widening the pytest_collection_modifyitems hook parameter from list[pytest.Function] to list[pytest.Item] in tests/mock_vws/fixtures/vuforia_backends.py, so non-function items (e.g., doctest/Sybil items) pass @beartype runtime checks.

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