Chore/upgrade spotless to 8.2.1

[curfew-marathon]

chore: upgrade Spotless plugin from 7.2.1 to 8.2.1

Updates the Spotless code formatting plugin to the latest version. This upgrade provides better Gradle compatibility and prepares the codebase for future Java version support.

Summary by CodeRabbit

• Chores
  • Updated minimum Java version requirement to 17.
  • Updated build dependencies and tooling.

[dosubot]

Related Documentation

Checked 8 published document(s) in 1 knowledge base(s). No updates required.

^{How did I do? Any feedback?}  

[coderabbitai]

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Walkthrough

This PR removes Java 11 from the CI matrix, making Java 17 the minimum supported version, and upgrades the Spotless Gradle plugin from 7.2.1 to 8.2.1 with corresponding Java compatibility updates in the build configuration.

Changes

Cohort / File(s)	Summary
CI/Workflow Configuration .github/workflows/main.yaml	Narrows Java matrix from [11, 17, 21] to [17, 21]; updates JDK setup to use java-version 17 instead of 11 across test and publish jobs.
Build Configuration build.gradle	Upgrades Spotless plugin from 7.2.1 to 8.2.1; updates sourceCompatibility and targetCompatibility from Java 11 to Java 17.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• BREAKING CHANGE: Remove Java 11 support #282: Performs identical changes to remove Java 11 and establish Java 17 as the minimum version across CI and build configuration.
• chore: added 'make build' and fixed gradle warning #284: Modifies Spotless plugin configuration in build.gradle, directly related to the Spotless upgrade in this PR.
• chore: ignore spotless v8.0.0 and greater versions #227: Updates Spotless and Java version compatibility, addressing compatibility between Spotless v8+ and Java 17 requirements.

Suggested reviewers

• jimmyjames
• rhamzeh

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Title check	⚠️ Warning	The title mentions upgrading Spotless to 8.2.1, which is a real change in build.gradle. However, the PR also includes a breaking change (dropping Java 11 support and making Java 17 the minimum), which is the more significant change highlighted in the commit messages and objectives. The title focuses on a secondary aspect rather than the primary breaking change.	Consider updating the title to reflect the main breaking change: 'Drop Java 11 support and upgrade to Java 17 minimum' or similar, as this is the more impactful change than the Spotless plugin upgrade.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch chore/upgrade-spotless-to-8.2.1

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 37.70%. Comparing base (b7e1cdb) to head (2328f3a).

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #285   +/-   ##
=========================================
  Coverage     37.70%   37.70%           
  Complexity     1236     1236           
=========================================
  Files           197      197           
  Lines          7609     7609           
  Branches        880      880           
=========================================
  Hits           2869     2869           
  Misses         4601     4601           
  Partials        139      139           

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[Copilot]

Pull request overview

Upgrades the Gradle Spotless plugin and updates the project’s Java baseline/CI matrix, aligning builds and publishing to run on newer JDKs.

Changes:

• Bump com.diffplug.spotless Gradle plugin from 7.2.1 to 8.2.1.
• Change Gradle sourceCompatibility/targetCompatibility from Java 11 to Java 17.
• Update GitHub Actions workflow to test on Java 17/21 only and run publish jobs on Java 17.

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated 1 comment.

File	Description
build.gradle	Updates Spotless plugin version; raises Java compilation target to 17.
.github/workflows/main.yaml	Removes Java 11 from CI matrix; standardizes coverage/publish jobs around Java 17+.

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[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In `@build.gradle`:
- Around line 29-30: The project now requires Java 17
(sourceCompatibility/targetCompatibility set to JavaVersion.VERSION_17); update
documentation accordingly by (1) changing README.md’s "minimum JDK version"
statement to Java 17 and adding a short note about the change, (2) adding a
Breaking Change entry in CHANGELOG.md that follows existing breakage formatting
(mention Java 17 requirement and affected versions), and (3) creating a brief
migration note (can be a new section in README.md or a separate MIGRATION.md)
that explains steps for users on Java 11 or earlier to upgrade their JDK or
toolchain and any build/tooling adjustments required.

[ewanharris]

Thanks dependabot!