Add CI configuration for Ruby 4.0

[aramprice]

Note: this will not cause the package to be consumed but once the code is merged and the pipeline configured the 4.0 package will be present and the release can be switched to use it.

[coderabbitai]

Walkthrough

The dependency bump workflow now targets Ruby 4.0, and the director source pins Ruby 4.0.5. Database configuration no longer invokes or defines the Postgres-specific Sequel thread-safety patch. The unit test files covering that patch and Sequel SQL string behavior were removed.

Suggested reviewers: a-hassanin, fmoehler, selzoc

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description only includes one note and omits all required template sections like context, tests, release notes, and breaking changes.	Add the required headings and fill in what changed, context, tests run, release-note text, breaking-change impact, and team tags.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the Ruby 4.0 CI/configuration update and matches the main change.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ruby-4.0

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@ci/pipeline.yml`:
- Line 1379: Update the package watched by check-for-updated-vendored-packages
to director-ruby-4.0, matching the active PACKAGE anchor, and remove the stale
director-ruby-3.4 reference.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 30e7c75d-fda0-4a49-abb3-466b8dc0c98f

📥 Commits

Reviewing files that changed from the base of the PR and between d2ff8b6 and 4f2b1c1.

📒 Files selected for processing (5)

• ci/pipeline.yml
• src/.ruby-version
• src/bosh-director/lib/bosh/director/config.rb
• src/bosh-director/spec/unit/bosh/director/postgres_thread_safety_patch_spec.rb
• src/bosh-director/spec/unit/bosh/director/sequel_spec.rb

💤 Files with no reviewable changes (3)

• src/bosh-director/spec/unit/bosh/director/postgres_thread_safety_patch_spec.rb
• src/bosh-director/spec/unit/bosh/director/sequel_spec.rb
• src/bosh-director/lib/bosh/director/config.rb

[colins]

That removes the temporary patch I applied. Thanks