`comparison-overlap` triggers for string enum members when the member name isn't the same as the comparison value

[bzoracler]

Bug Report, To Reproduce, and Actual Behaviour

If the enum member's name to compare isn't equal to the comparing value, a false positive comparison-overlap is triggered. See mypy Playground:

from enum import Enum

class A(str, Enum):  # Same behaviour if `class A(enum.StrEnum)`
    a = "b"

A.a == "a"  # OK
A.a == "b"  # E: Non-overlapping equality check (left operand type: "Literal[A.a]", right operand type: "Literal['b']")  [comparison-overlap]

Expected Behavior

No errors

Your Environment

• Mypy version used: 1.17, master
• Python version used: 3.12