feat: FT212 dataclasses — field / asdict / astuple / replace / __post_init__#595
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未設定時は consumer FT のバースト smoke で 429 にならないようにする。 Co-authored-by: Cursor <cursoragent@cursor.com>
…_init__ (#594) 摩擦点: - F-1: astuple の戻り値型は tuple[object, ...] — 型安全な使用には dataclass ラッパーが必要 - F-2（HIGH）: Infinity/NaN 非標準 JSON → FastAPI エラーシリアライザーが 500 DoS → _sanitize_value() + カスタム RequestValidationError ハンドラーで修正 クラッカーペンテスト: 10 シナリオ全て 422（修正後） バージョン: v1.8.88 → v1.8.89 Closes #594 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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概要
dataclassesモジュールの field / asdict / astuple / replace / post_init を HTTP API で実証クラッカーペンテスト発見事項
Infinity/NaNが Python 3.14 のパーサーに受け入れられ、FastAPI のエラーシリアライザーが 500 クラッシュ → DoS ベクター_sanitize_value()+ カスタムRequestValidationErrorハンドラーで 422 を返すよう修正チェックリスト
pytest25 passed（クラッカーペンテスト 10 シナリオ含む）mypy --strict0 errorsruff check0 errorsruff format --checkpassCloses #594
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