chore(deps): upgrade Spring Boot 4.0.3, MariaDB 12.2, and Gradle 9.3.1

[devondragon]

Summary

Upgrades core dependencies to their latest versions:

• Spring Boot 4.0.2 → 4.0.3
• Gradle 9.0.0 → 9.3.1
• MariaDB Docker image 11.6 → 12.2
• springdoc-openapi 2.8.9 → 3.0.1
• WireMock migrated from com.github.tomakehurst:wiremock-jre8-standalone to org.wiremock:wiremock-standalone 3.13.2
• hibernate-validator version now managed by Spring Boot BOM (removed explicit version pin and separate jakarta.validation-api dependency)
• Groovy pinned to 5.0.3 to work around GROOVY-11745

Groovy 5.0.4 workaround

Spring Boot 4.0.3 bumps Groovy from 5.0.3 to 5.0.4. Groovy 5.0.4 has a regression (GROOVY-11745) that causes an NPE when Groovy 5 code calls setters on objects from Groovy 4-compiled libraries. This breaks thymeleaf-layout-dialect 3.4.0 (compiled with Groovy 4.0.25) at runtime in DecorateProcessor.doProcess().

The fix is committed upstream but Groovy 5.0.5 is not yet released. As a workaround, we exclude Groovy from thymeleaf-layout-dialect and pin to 5.0.3 explicitly. This can be removed once Spring Boot adopts Groovy 5.0.5+.

See also: ultraq/thymeleaf-layout-dialect#251

Test plan

• ./gradlew test — all tests pass
• Verified groovy:5.0.3 is resolved on the runtime classpath
• Manual smoke test of the application with ./gradlew bootRun

[Copilot]

Pull request overview

This PR upgrades core dependencies to their latest versions, including Spring Boot 4.0.3, Gradle 9.3.1, and several third-party libraries. The upgrade includes a workaround for a Groovy regression that affects the thymeleaf-layout-dialect library.

Changes:

• Upgraded Spring Boot from 4.0.2 to 4.0.3 and Gradle from 9.0.0 to 9.3.1
• Migrated WireMock from deprecated package to new org.wiremock artifact and upgraded springdoc-openapi to 3.0.1
• Implemented Groovy 5.0.3 pinning workaround to address GROOVY-11745 regression affecting thymeleaf-layout-dialect

Reviewed changes

Copilot reviewed 4 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
build.gradle	Updated Spring Boot, springdoc-openapi, WireMock, and hibernate-validator versions; added Groovy 5.0.3 workaround
compose.yaml	Updated MariaDB Docker image version
gradle/wrapper/gradle-wrapper.properties	Updated Gradle distribution URL to 9.3.1
gradle/wrapper/gradle-wrapper.jar	Updated Gradle wrapper binary
gradlew	Updated Gradle wrapper script with new copyright, SPDX identifier, and execution changes
gradlew.bat	Updated Gradle wrapper batch script with SPDX identifier and error handling improvements

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