Bump Spring Boot to 4.1

[D-D-H]

Upgrade Spring Boot from 3.3.11 to 4.1.0.

• Update Gradle wrapper to 8.14.3 (required by the Spring Boot 4 plugin)
• Pin spring-retry to 2.0.12 and add spring-boot-starter-webmvc-test, which are no longer provided transitively by the Spring Boot 4 BOM
• Align JUnit (6.0.3) and Mockito (5.23.0) with the Spring Boot 4.1 BOM
• Migrate imports for the split spring-boot-autoconfigure modules (OAuth2ClientProperties, TomcatServletWebServerFactory, MultipartProperties, EntityScan, SecurityAutoConfiguration, WebMvcTest)
• Replace @MockBean with @MockitoBean
• Insert GsonHttpMessageConverter after ByteArrayHttpMessageConverter so @RequestBody byte[] is still read as raw bytes under Spring Framework 7

[Copilot]

Pull request overview

Upgrades the server build and test suite to Spring Boot 4.1.0 / Spring Framework 7 expectations, including dependency and import migrations required by split autoconfigure/test modules and updated Mockito integration.

Changes:

• Bump Spring Boot Gradle plugin to 4.1.0 and Gradle wrapper to 8.14.3.
• Align dependency set with the Spring Boot 4.1 BOM (pin spring-retry, add spring-boot-starter-webmvc-test, update JUnit/Mockito).
• Migrate code/test imports for moved Boot modules and switch @MockBean to @MockitoBean; adjust MVC message-converter ordering for byte[] request bodies.

Reviewed changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
server/src/test/java/org/eclipse/jifa/server/domain/dto/TestFileTransferRequest.java	Update WebMvc test imports for Spring Boot 4 module split.
server/src/test/java/org/eclipse/jifa/server/controller/TestHealthCheckController.java	Update WebMvc test + Security auto-config imports for Boot 4.
server/src/test/java/org/eclipse/jifa/server/controller/TestHandshakeController.java	Replace @MockBean with @MockitoBean and update Boot 4 imports.
server/src/test/java/org/eclipse/jifa/server/controller/TestFileController.java	Replace @MockBean with @MockitoBean and update Boot 4 imports.
server/src/test/java/org/eclipse/jifa/server/controller/TestElasticWorkerController.java	Replace @MockBean with @MockitoBean and update Boot 4 imports.
server/src/test/java/org/eclipse/jifa/server/controller/TestAnalysisApiStompController.java	Replace @MockBean with @MockitoBean for Boot 4 / Spring Test.
server/src/test/java/org/eclipse/jifa/server/controller/TestAnalysisApiHttpController.java	Replace @MockBean with @MockitoBean and update Boot 4 imports.
server/src/main/java/org/eclipse/jifa/server/controller/HandshakeController.java	Update moved Boot configuration property imports (OAuth2/multipart).
server/src/main/java/org/eclipse/jifa/server/controller/GlobalExceptionHandler.java	Update moved multipart configuration import.
server/src/main/java/org/eclipse/jifa/server/configurer/SecurityFilterConfigurer.java	Update moved OAuth2 client properties import.
server/src/main/java/org/eclipse/jifa/server/configurer/HttpConfigurer.java	Update moved Tomcat factory import and adjust Gson converter insertion logic.
server/src/main/java/org/eclipse/jifa/server/configurer/EntityConfigurer.java	Update moved @EntityScan import.
server/server.gradle	Bump Boot plugin, pin spring-retry, add WebMVC test starter.
jifa.gradle	Bump Boot plugin and adjust Jacoco report aggregation configuration.
gradle/wrapper/gradle-wrapper.properties	Update Gradle wrapper distribution to 8.14.3.
gradle/java.gradle	Align test dependencies (JUnit/Mockito) with the new BOM and launcher requirements.

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[jasonk000]

Please proceed - I won't have time to look at this now, maybe in a few weeks - Thanks!