chore(deps): bump com.diffplug.spotless from 6.25.0 to 8.4.0

[dependabot]

Bumps com.diffplug.spotless from 6.25.0 to 8.4.0.

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Greptile Summary

This PR bumps the com.diffplug.spotless Gradle plugin from 6.25.0 to 8.4.0 — a two-major-version jump that includes a number of documented breaking changes.

Key considerations checked:

• Breaking: Java 17 minimum (8.0.0) — The project already targets Java 17 (javaTargetVersion = 17), so this requirement is satisfied.
• Breaking: Gradle 7.3 minimum (8.0.0), raised to Gradle 8.1 (8.1.0) — The project uses Gradle 9.2.1 (via gradle-wrapper.properties), which satisfies both thresholds.
• Breaking: removeWildcardImports → forbidWildcardImports rename (8.0.0) — This project's spotless configuration does not use removeWildcardImports, so no impact.
• Breaking: spotlessInstallGitPrePushHook now root-project only (8.0.0) — Not used in this single-project build; no impact.
• Breaking: LintSuppression.setPath now enforces unix-style paths (8.0.0) — Not used here; no impact.

The project's spotless configuration is intentionally minimal (trimTrailingWhitespace() and endWithNewline() for Java and misc targets), which sidesteps all documented API renames and behavioral breaking changes. The bump appears safe to merge.

Confidence Score: 5/5

• This PR is safe to merge — the version bump satisfies all new minimum requirements and the project's minimal spotless configuration avoids all breaking API changes.
• The only change is a single version string bump. All documented breaking changes in 7.x and 8.x either do not apply to this project's minimal spotless setup or are already satisfied by the project's existing Java 17 target and Gradle 9.2.1 wrapper. No functional code is modified.
• No files require special attention.

Important Files Changed

Filename	Overview
build.gradle.kts	Bumps com.diffplug.spotless from 6.25.0 to 8.4.0; project's minimal spotless config is unaffected by all documented breaking changes, and the project's Java 17 target and Gradle 9.2.1 wrapper satisfy the new minimum requirements.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A["`./gradlew check`"] --> B[spotlessCheck]
    B --> C{Spotless 8.4.0}
    C --> D["Java sources\nsrc/**/*.java\ntrimTrailingWhitespace\nendWithNewline"]
    C --> E["Misc sources\n*.gradle.kts / *.md\n.gitignore / Makefile\ntrimTrailingWhitespace\nendWithNewline"]
    D --> F{Violations?}
    E --> F
    F -- Yes --> G["Build FAILS\nRun ./gradlew spotlessApply"]
    F -- No --> H[Build PASSES]

    style C fill:#4a90d9,color:#fff
    style G fill:#e74c3c,color:#fff
    style H fill:#2ecc71,color:#fff

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