Update dependency java to v25

[renovate]

This PR contains the following updates:

Package	Update	Change
java	major	21.0 → 25.0.2+10.0.LTS

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[hashicorp-vault-sonar-prod]

Renovate Jira issue ID: MCP-412

[sonar-review-alpha]

Summary

This PR updates the mise.toml development tool configuration from Java 21.0 to Java 25.0.2+10.0.LTS (a major version bump to the latest LTS release).

Note: This is a Renovate bot update to the development environment specification only. The actual project build configuration remains pinned to Java 21:

• build.gradle.kts specifies JavaLanguageVersion.of(21) for the Gradle toolchain
• Dockerfile uses eclipse-temurin:21-jdk-alpine for the runtime image

What reviewers should know

What to review:

1. Verify whether the mise.toml update is intentional or if it should be synchronized with the Gradle/Docker configuration
2. If Java 25 is the target environment, the build toolchain and Dockerfile may need updating as well
3. If Java 21 is the minimum required version, consider whether mise.toml should remain aligned with that

Key files:

• mise.toml — development tool version (updated)
• build.gradle.kts:31 — Gradle Java toolchain (still Java 21)
• Dockerfile:1 — base image (still Java 21)

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[sonar-review-alpha]

LGTM! ✅

The change is a single-line update to mise.toml, upgrading the local development Java version from 21.0 to 25.0.2+10.0.LTS. No logic, no business code, no tests are touched.

One alignment concern worth noting: the project's actual build toolchain (build.gradle.kts line 31: JavaLanguageVersion.of(21)) and the Docker image (Dockerfile:1: eclipse-temurin:21-jdk-alpine) both remain pinned to Java 21. This means developers using mise will build with Java 25 locally while CI and the shipped runtime continue to use Java 21. This is likely intentional (mise tracks a newer available JDK for local use while the project targets Java 21 as minimum), but worth a conscious confirmation that the team is comfortable with that gap.

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