[ISSUE #14815] build(style): apply Spotless formatting to consistency module

[cxhello]

What is the purpose of the change

Apply Spotless formatting to the consistency module as part of the incremental formatting rollout (#14815).

Brief changelog

• Format 20 Java source files in consistency module via mvn spotless:apply
• Use // @formatter:off/on for 1 array initializer in ProtoMessageUtilTest.java where Spotless wrapping conflicts with Checkstyle IndentationCheck

Verifying this change

• mvn checkstyle:check -pl consistency passes with 0 errors
• mvn spotless:check -pl consistency passes
• No logic changes, formatting only

Follow this checklist to help us incorporate your contribution quickly and easily:

• Make sure there is a Github issue filed for the change (usually before you start working on it). Trivial changes like typos do not require a Github issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue.
• Format the pull request title like [ISSUE #123] Fix UnknownException when host config not exist. Each commit in the pull request should have a meaningful subject line and body.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Write necessary unit-test to verify your logic correction, more mock a little better when cross module dependency exist. If the new feature or significant change is committed, please remember to add integration-test in test module.
• Run mvn -B clean package apache-rat:check spotbugs:check -DskipTests to make sure basic checks pass. Run mvn clean install to make sure unit-test pass. Run mvn clean test-compile failsafe:integration-test to make sure integration-test pass.

[github-actions]

Thanks for your this PR. 🙏
Please check again for your PR changes whether contains any usage/api/configuration change such as Add new API , Add new configuration, Change default value of configuration.
If so, please add or update documents(markdown type) in docs/next/ for repository nacos-group/nacos-group.github.io

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感谢您提交的PR。 🙏
请再次查看您的PR内容，确认是否包含任何使用方式/API/配置参数的变更，如：新增API、新增配置参数、修改默认配置等操作。
如果是，请确保在提交之前，在仓库nacos-group/nacos-group.github.io中的docs/next/目录下添加或更新文档（markdown格式）。

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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