ci: use GitHub App token for release bump PR

[ruromero]

Summary

• Post-release version bump PRs created by github-actions[bot] using GITHUB_TOKEN don't trigger CI checks (GitHub's anti-recursion protection)
• Use actions/create-github-app-token@v2 with the installed GitHub App (CI_APP_ID / CI_APP_PRIVATE_KEY secrets) to generate a token
• Pass this token to peter-evans/create-pull-request@v8 so the resulting PR triggers the "Build and test Java 21" workflow

Test plan

• Trigger a release via workflow_dispatch and verify the bump PR triggers the Build check
• Verify the PR is created by the GitHub App identity, not github-actions[bot]

🤖 Generated with Claude Code

Summary by Sourcery

CI:

• Add a workflow step to generate a GitHub App token from CI_APP_ID and CI_APP_PRIVATE_KEY secrets and use it for the release bump pull request.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Configures the release workflow to generate a GitHub App-based token and use it for the post-release bump pull request so that CI is triggered on the created PR.

Sequence diagram for release bump PR using GitHub App token

sequenceDiagram
    actor Developer
    participant ReleaseWorkflow as Release_workflow_release_yml
    participant GitHubApp as CI_GitHub_App
    participant GitHubAPI as GitHub_API
    participant BumpPR as Bump_Version_PR
    participant BuildWorkflow as Build_and_test_Java_21_workflow

    Developer->>ReleaseWorkflow: Trigger workflow_dispatch release
    ReleaseWorkflow->>ReleaseWorkflow: Run Maven release steps

    ReleaseWorkflow->>GitHubAPI: Request GitHub App token
    GitHubAPI-->>ReleaseWorkflow: Return installation access token

    ReleaseWorkflow->>GitHubApp: Use token with create_pull_request action
    GitHubApp->>GitHubAPI: Create bump version PR
    GitHubAPI-->>BumpPR: Open PR authored by GitHub App identity

    GitHubAPI->>BuildWorkflow: Trigger Build and test Java 21 on PR events
    BuildWorkflow-->>GitHubAPI: Report CI status on bump PR

Loading

File-Level Changes

Change	Details	Files
Generate a GitHub App installation token in the release workflow and use it for the version bump pull request.	Add a step that uses actions/create-github-app-token@v2 with CI_APP_ID and CI_APP_PRIVATE_KEY secrets to create a GitHub App token Assign the app-token step an id so its outputs can be referenced later in the job Pass the generated token output into peter-evans/create-pull-request@v8 via the token input so the bump PR is authored by the GitHub App and triggers CI	.github/workflows/release.yml

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[sourcery-ai]

Hey - I've left some high level feedback:

• Consider adding a conditional or fallback path for forks or environments where CI_APP_ID / CI_APP_PRIVATE_KEY are not configured so the release workflow fails more gracefully instead of at the token-generation step.
• Double-check that the GitHub App used here has the minimum required repo and workflow permissions for peter-evans/create-pull-request to operate, and document or enforce those permissions to avoid future permission-related failures.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- Consider adding a conditional or fallback path for forks or environments where `CI_APP_ID` / `CI_APP_PRIVATE_KEY` are not configured so the release workflow fails more gracefully instead of at the token-generation step.
- Double-check that the GitHub App used here has the minimum required repo and workflow permissions for `peter-evans/create-pull-request` to operate, and document or enforce those permissions to avoid future permission-related failures.

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