Add pull request types to unit test workflow

[shichengripple001]

High Level Overview of Change

Fix unit test trigger, so PR raised by release pipeline can be triggered when converted to "Ready for review"

Context of Change

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactor (non-breaking change that only restructures code)
• Tests (You added tests for code that already exists, or your new feature included in this PR)
• Documentation Updates
• Release

Did you update CHANGELOG.md?

• Yes
• No, this change does not impact library users

Test Plan

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

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Walkthrough

The pull request modifies the GitHub Actions workflow configuration to explicitly specify pull request trigger types (opened, synchronize, reopened, ready_for_review) for the unit test workflow, replacing implicit default behavior.

Changes

Cohort / File(s)	Summary
GitHub Actions Workflow Configuration .github/workflows/unit_test.yml	Expanded pull_request trigger to explicitly include event types: opened, synchronize, reopened, and ready_for_review.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• Release pipeline #876: Modifies the same GitHub Actions workflow file (.github/workflows/unit_test.yml), handling workflow trigger configurations and git reference parameters.

Suggested reviewers

• ckeshava
• mvadari
• pdp2121

Poem

🐰 A trigger expands with grace,
Four types now race through CI space,
Opened, synced, reopened too,
And ready reviews see it through!
The workflows dance, tests run fast,
This simple change will surely last. ✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description is incomplete with most required sections unfilled: Type of Change boxes unchecked, Context of Change section empty, Test Plan section empty, and CHANGELOG.md status unmarked.	Fill in the Context of Change section, check the appropriate Type of Change box, provide a Test Plan with instructions to reproduce, and indicate CHANGELOG.md update status.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: adding pull request types to the unit test workflow trigger.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix-unit-test-trigger

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