Enable UP046: Simplify generic class syntax (Python 3.12)

[HyeockJinKim]

Rule

UP046: non-pep695-generic-class

Purpose

Modernize generic class definitions to Python 3.12 PEP 695 syntax.

Example

# Before (old style)
from typing import Generic, TypeVar
T = TypeVar("T")

class Container(Generic[T]):
    def __init__(self, item: T) -> None:
        self.item = item

# After (Python 3.12 style)
class Container[T]:
    def __init__(self, item: T) -> None:
        self.item = item

Auto-fix

✅ Available

Notes

• Part of Python 3.12 modernization effort
• Eliminates boilerplate TypeVar definitions
• Cleaner and more readable generic class syntax

JIRA Issue: BA-4027