Consistency with `Final` usage in Standard Library Stubs

Currently usage of typing.Final to indicate constants is mixed throughout the standard library (e.g. some newer stubs will utilize it potentially, but it's left out in other places) Has there been any discussion in the past of experimenting with applying Final to all UPPER_UNDER module stdlib constants?

I think class var constants would require a bit more context on usage, as it might be expected for subclasses to override them, but it could be worth starting with modules and gauging the impact from MyPy primer.

まず、標準ライブラリのスタブ全体で既存の typing.Final の使用状況と、issue で参照されている過去の議論を確認します。MyPy primer を使用して、モジュールレベルの UPPER_UNDER 定数に Final を適用した場合の影響を評価します。明確なポリシーと実装範囲について合意できた時点で作業は完了です。