refactor(auth): AccountRepository / SellerCredentialRepository 분리 + AuthRepository 제거 (P0-1 단계 3)

[chanwoo7]

Summary

• AuthRepository 의 잔여 책임을 2 개 도메인 Repository 로 분리하고 빈 AuthRepository 자체를 제거.
• 단계 1·2 (RefreshSession / AuditLog) 와 합쳐, God-class 530 줄을 4 개의 책임별 Repository 로 모두 해체.
• 모든 신규 Repository 는 interface + Symbol DI Token 패턴 (P1-1 방침 일관).

Scope

• 신규
  • AccountRepository (interface + impl + spec) — Account / AccountIdentity / UserProfile 의 read/write
    • findIdentityByProviderSubject, findAccountByEmail, upsertUserByOidcIdentity,
      findAccountForJwt, findAccountForMe
    • 인터페이스 반환 타입은 `Prisma.{Model}GetPayload<...>` 로 명시
  • SellerCredentialRepository (interface + impl + spec) — username / password_hash / last_login_at write
    • findSellerCredentialByUsername, findSellerCredentialByAccountId,
      updateSellerLastLogin, updateSellerPasswordHash
• 제거
  • AuthRepository (530줄) + 해당 spec
• 변경
  • AuthService: `accounts` / `sellerCredentials` 2 개 신규 의존, `this.repo.*` 호출 8 개 전환
  • JwtBearerStrategy: `accounts` 의존으로 전환
  • AuthModule: 신규 2 개 Repository 를 DI Token 패턴으로 등록
  • 영향 받은 모든 spec 동반 갱신 (auth.service / auth.seller / jwt-bearer / app.e2e)

P0-1 진행 상황

• ✅ 단계 1: RefreshSessionRepository
• ✅ 단계 2: AuditLogRepository (신규 audit-log 모듈)
• ✅ 단계 3: AccountRepository / SellerCredentialRepository (본 PR)
• ⏳ 단계 4: TokenService 추출
• ⏳ 단계 5: OidcLoginService 추출
• ⏳ 단계 6: SellerCredentialService + logout 통합
• ⏳ 단계 7: AuthService 잔여 정리

Impact

• FE: 없음 (REST 엔드포인트·응답·에러 형태 동일)
• DB: 변경 없음
• Coverage: 1168 tests pass, 전 임계 통과

Test plan

• yarn validate (lint + tsc + dto:check + test:cov) 로컬 통과
• account.repository.spec.ts / seller-credential.repository.spec.ts 신규 통합 테스트
• auth.service / auth.seller.service / jwt-bearer.strategy / app.e2e 모두 회귀 없음
• CI 통과 확인

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch refactor/auth-account-seller-credential-repository

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[codecov]

Codecov Report

❌ Patch coverage is 96.42857% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...rc/features/auth/strategies/jwt-bearer.strategy.ts	66.66%	1 Missing ⚠️

📢 Thoughts on this report? Let us know!

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟢	Statements	97.11%	3331/3430
🟢	Branches	92.99%	1128/1213
🟢	Functions	93.51%	634/678
🟢	Lines	97.42%	3054/3135

Test suite run success

1168 tests passing in 133 suites.

Report generated by 🧪jest coverage report action from 6999053