Build with Java 17

[devin-ai-integration]

Summary

Moves the build to Java 17: sourceCompatibility/targetCompatibility '11' -> '17'. No production code changes were needed — Spring Boot 2.6.3, Gradle 7.4 and all dependencies (MyBatis, DGS, joda-time, sqlite-jdbc) compile and run as-is on JDK 17.

The only real friction was Spotless: googleJavaFormat() reflects into jdk.compiler internals, which JEP 396/403 strong encapsulation blocks on JDK 16+, so spotlessJava failed with IllegalAccessError: ... cannot access class com.sun.tools.javac.parser.Tokens$TokenKind. Fixed by adding a gradle.properties that gives the Gradle daemon (where Spotless runs in-process) the needed exports rather than bumping the plugin/formatter versions:

org.gradle.jvmargs=--add-exports jdk.compiler/com.sun.tools.javac.{api,file,parser,tree,util}=ALL-UNNAMED

With Spotless actually running again it flagged one pre-existing formatting violation in DefaultJwtServiceTest, applied here via spotlessApply.

Verified locally on OpenJDK 17.0.13: ./gradlew clean build succeeds and all 68 tests pass (0 failures/errors), including the @WebMvcTest API tests, MyBatis persistence tests and context startup.

Link to Devin session: https://app.devin.ai/sessions/6698c41bd3904f85828cfdab96ddd2ea
Open in Devin Desktop: https://app.devin.ai/desktop/session/6698c41bd3904f85828cfdab96ddd2ea?variant=devin
Requested by: @izancoomontesuarez

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Note

Devin errored when opening this Pull Request as izancoomontesuarez.
As a fallback, Devin opened this PR as itself.

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Devin Review found 0 potential issues.