Python V1 Release

I'd like us to consider releasing a v1.0 of this SDK. After a cursory inspection, I think we've implemented the spec up the most recent release. In addition to that, the usage as reported by PyPI is comparable to our other v1.0+ SDKs.

That leaves us with a few tasks:

• Audit the SDK to ensure we are spec compliant
• Fix any outstanding bugs that would significantly blemish v1.0
• Remove any deprecations we don't want to carry forward into v1.0
• Make any last minute breaking changes to function/type names etc, for ergonomic improvements

Please weigh in with your vote of confidence (or not). Also feel free to mention or create any issues that you believe are blockers.

まず Python SDK を現在の OpenFeature 仕様に照らして監査し、続いて未解決のバグ、非推奨事項、公開されている関数名または型名を確認します。この issue にはファイルやテストの指定がないため、最初にチェックリストの各項目を関連するコードと既存の issue に対応付けます。ブロッカーが解決済みまたは明示的に受け入れ済みで、プロジェクトが v1.0 リリースについて明確な判断を下していれば完了です。