[Enhancement] Avoid using the .value attribute on StrEnum

[laipz8200]

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1. Is this request related to a challenge you're experiencing? Tell me about your story.

Use the members of StrEnum directly, instead of the .value attribute. Because the members of StrEnum are already strings, using them directly is more concise and avoids unnecessary attribute access, making the code easier to read. For example, use MyEnum.VALUE instead of MyEnum.VALUE.value.

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