chore(deps): Update dependency com.diffplug.spotless to v8.9.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
com.diffplug.spotless	8.8.0 → 8.9.0

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Configuration

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[claude]

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🤖 Claude 의존성 영향도 분석

📦 변경점 요약

• com.diffplug.spotless 8.8.0 → 8.9.0 (minor)
• Spotless는 빌드 시점 코드 포맷터 플러그인으로, 런타임 classpath에 포함되지 않음
• gradle.lockfile 변경 없음 (빌드 플러그인은 lockfile 추적 대상 외)
• Release notes 원문: Spotless Changelog 참조 권장 (PR 본문에 세부 내용 없음)

🎯 Q-Asker 영향도: 🟢 LOW

사용처:

• build.gradle:64 — 루트 subprojects 블록에서 모든 서브모듈에 com.diffplug.spotless 플러그인 적용 (Google Java Format 1.25.2로 Java 파일 포맷)

예상 영향:

• 런타임 동작에는 영향 없음 — 빌드/포맷 단계(./gradlew spotlessApply, spotlessCheck)에만 적용
• google-java-format 버전(1.25.2)은 별도 관리이므로 포맷 규칙 자체는 변경되지 않을 가능성 높음
• minor 업데이트로 기존 Spotless DSL(java { googleJavaFormat(...) }) 호환성 유지 예상

⚠️ Renovate 아티팩트 실패 관련 (별도 이슈):
Renovate가 보고한 아티팩트 업데이트 실패는 spotless 변경과 무관한 기존 문제임:

Plugin [id: 'com.vanniktech.dependency.graph.generator', version: '0.8.0'] was not found

com.vanniktech.dependency.graph.generator 플러그인이 Gradle Plugin Repository에서 조회 불가 상태 → Renovate의 lockfile 재생성이 이 오류로 중단됨. lockfile 변경이 없으므로 이 PR 자체의 병합 위험도에는 영향 없으나, dependency.graph.generator 플러그인 가용성 문제를 별도로 확인 필요.

✅ 권장 액션

• CI green 확인 (spotlessCheck 포함)
• com.vanniktech.dependency.graph.generator 0.8.0 플러그인 조회 실패 원인 별도 확인 (플러그인 저장소 이전 또는 버전 지원 중단 여부)

📋 참고

• 변경 파일: gradle/libs.versions.toml (1줄 변경)
• lockfile 변경: 없음 (빌드 플러그인 특성상 정상)
• 분석 모델: claude-sonnet-4-6

[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: gradle/libs.versions.toml

Command failed: ./gradlew -Dorg.gradle.jvmargs=-Xms512m -Xmx512m --console=plain --dependency-verification lenient -q properties

FAILURE: Build failed with an exception.

* Where:
Build file '/tmp/renovate/repos/github/q-asker/api/build.gradle' line: 3

* What went wrong:
Plugin [id: 'com.vanniktech.dependency.graph.generator', version: '0.8.0'] was not found in any of the following sources:

- Gradle Core Plugins (plugin is not in 'org.gradle' namespace)
- Included Builds (No included builds contain this plugin)
- Plugin Repositories (could not resolve plugin artifact 'com.vanniktech.dependency.graph.generator:com.vanniktech.dependency.graph.generator.gradle.plugin:0.8.0')
  Searched in the following repositories:
    Gradle Central Plugin Repository

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.

BUILD FAILED in 14s