Add stubs for `profiling`#15652

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johnslavik:profiling-package

Commits on Apr 20, 2026

Add typed stubs for the profiling stdlib package

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[pre-commit.ci] auto fixes from pre-commit.com hooks
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Use a `TypeAlias`
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Remove unnecessary annotations from `profiling` stubs

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Remove private module stubs and their re-exports

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Remove live_collector constant re-exports from public API

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Strip live_collector to its user-facing API surface

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Restore MICROSECONDS_PER_SECOND to sampling/constants.pyi

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Align stubs with documented/declared public API surface

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