chore: jest 29 → 30 마이그레이션

[chanwoo7]

배경

이슈 #58의 jest 메이저 마이그레이션입니다.
보류 사유였던 실DB 테스트 인프라 이관이 완료되어(현재 184 suites 전부 testcontainers) 수행 조건을 충족했습니다.
이슈는 ts-jest 30 동반 업그레이드를 전제했지만, ts-jest 29.4.x가 jest ^30을 peer로 지원해 bump가 필요 없어졌습니다.

변경점

• jest ^29 → ^30 (30.4.1), @types/jest ^29 → ^30.
• ts-jest는 ^29 유지 (peer: jest ^29 || ^30).
• 테스트 코드·jest 설정 변경 없음.

검증

• yarn validate 전체 통과 (lint + tsc + dto:check + arch:check + 커버리지 게이트, 1574 tests / 184 suites).
• 첫 실행에서 1건 실패가 있었으나 testcontainers DB 연결 순단(플레이크)으로 확인 — 단독 재실행·전체 재실행 모두 통과.

Closes #58

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[github-actions]

🧹 knip — dead-code 리포트

요약 항목 없음

전체 리포트

(knip 출력 없음 — 이슈 0이거나 실행 실패)

청소 후보(오탐 가능) · 기준 docs/guide/architecture-conventions.md

[github-actions]

🩺 NestJS Doctor — 89/100 (Good)

진단 279건 (error 0).

Category	error	warning	info
architecture	0	0	13
correctness	0	126	0
performance	0	24	17
schema	0	0	86
security	0	13	0

architecture / security 상위 항목

• info architecture/architecture/no-barrel-export-internals: Barrel file re-exports internal type 'IAuditLogRepository'.
• warning security/security/no-exposed-env-vars: Direct 'process.env.NODE_ENV' access in 'AuthController'. Use ConfigService instead.
• warning security/security/require-guards-on-endpoints: Endpoint 'start' has no @UseGuards() at class or method level.
• warning security/security/require-guards-on-endpoints: Endpoint 'callback' has no @UseGuards() at class or method level.
• warning security/security/require-guards-on-endpoints: Endpoint 'refresh' has no @UseGuards() at class or method level.
• warning security/security/require-guards-on-endpoints: Endpoint 'logout' has no @UseGuards() at class or method level.
• warning security/security/require-guards-on-endpoints: Endpoint 'sellerLogin' has no @UseGuards() at class or method level.
• warning security/security/require-guards-on-endpoints: Endpoint 'sellerRefresh' has no @UseGuards() at class or method level.
• warning security/security/require-guards-on-endpoints: Endpoint 'sellerLogout' has no @UseGuards() at class or method level.
• warning security/security/require-guards-on-endpoints: Endpoint 'devIssueToken' has no @UseGuards() at class or method level.
• info architecture/architecture/no-barrel-export-internals: Barrel file re-exports internal module '@/features/conversation/repositories/conversation.repository'.
• info architecture/architecture/no-barrel-export-internals: Barrel file re-exports internal type 'ConversationRepository'.
• info architecture/architecture/no-barrel-export-internals: Barrel file re-exports internal module '@/features/order/repositories/order.repository'.
• info architecture/architecture/no-barrel-export-internals: Barrel file re-exports internal type 'OrderRepository'.
• info architecture/architecture/no-barrel-export-internals: Barrel file re-exports internal module '@/features/product/repositories/product.repository'.

오탐 포함 가능 · 기준 docs/guide/architecture-conventions.md

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟢	Statements	97.61%	4772/4889
🟢	Branches	93.96%	1928/2052
🟢	Functions	95.99%	933/972
🟢	Lines	98.21%	4339/4418

Test suite run success

1574 tests passing in 184 suites.

Report generated by 🧪jest coverage report action from 343ad09