Upgrade Java version from 11 to 17 in GitHub Actions workflow

[devin-ai-integration]

Summary

Updates the GitHub Actions CI workflow (gradle.yml) to use Java 17 (Azul Zulu distribution) instead of Java 11. This is a two-line change: the step name and the java-version parameter.

Review & Testing Checklist for Human

• Verify CI passes: The most important check — confirm that the Gradle build and test suite complete successfully under JDK 17. Java 11→17 can introduce breaking changes (removed APIs, stronger JDK internal encapsulation via --illegal-access=deny default).
• Check Gradle wrapper version: Ensure the project's Gradle wrapper version supports Java 17 (Gradle 7.3+ required). Inspect gradle/wrapper/gradle-wrapper.properties.
• Consider build.gradle alignment: This PR only changes the CI JDK — verify whether sourceCompatibility/targetCompatibility in build.gradle should also be bumped to 17, or if compiling with JDK 17 targeting an older bytecode level is intentional.

Notes

• Requested by: @chriscazenave-dev
• Link to Devin run

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[devin-ai-integration]

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✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

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