feat: 카테고리 추천 모델 변경

[stae1102]

No description provided.

[Copilot]

Pull Request Overview

This PR updates the category recommendation model from llama3-8b-8192 to llama-3.1-8b-instant and refactors import statements to use single-line format instead of multi-line destructuring.

• Changed AI model version for category recommendations
• Consolidated multi-line import statements into single-line format

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