[fix] Token 갱신 시 발생하는 500 에러 잡기

[wldks1008]

Related Issue 📌

close #272

Description ✔️

• refresh Token에서 claim 가져오기 전 검증 수행

To Reviewers

[Copilot]

Pull Request Overview

This PR fixes a 500 error occurring during token refresh by adding a pre-validation step for refresh tokens and refactoring the token generation logic.

• Added an early call to validate the refresh token
• Removed duplicate token validation
• Reformatted event publication code in user creation

Comments suppressed due to low confidence (2)

src/main/java/org/hankki/hankkiserver/api/auth/service/AuthService.java:56

• Ensure that jwtValidator.validateRefreshToken consistently handles tokens with or without the BEARER prefix. If the expected format is without the prefix, consider using the strippedToken for validation.

jwtValidator.validateRefreshToken(refreshToken);

src/main/java/org/hankki/hankkiserver/api/auth/service/AuthService.java:59

• Confirm that generateTokens properly updates the user's refresh token as the previous implementation explicitly updated it via userInfo.

return generateTokens(userId);