ci(test): run the Test workflow on PRs to any base branch

[freshtonic]

The Test workflow's pull_request trigger had branches: [main], so it only ran for PRs whose base is main. Stacked / queued PRs target intermediate branches (e.g. queue/<name>/...), so CI was skipped on every PR in a stack except the front one.

This drops the branches filter from the pull_request trigger so the workflow runs on pull requests regardless of base branch. The push trigger stays scoped to main (post-merge), and paths-ignore / workflow_dispatch are unchanged.

Separate, standalone change off main (not part of the EQL v3 queue).

Summary by CodeRabbit

• Tests
  • Continuous integration checks now run for pull requests targeting any branch, including intermediate branches in stacked or queued workflows.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: d964c390-aad3-482c-b57a-c62be23bdaee

📥 Commits

Reviewing files that changed from the base of the PR and between 43da7e4 and b54dc04.

📒 Files selected for processing (1)

• .github/workflows/test.yml

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📝 Walkthrough

Walkthrough

The GitHub Actions test workflow now runs for pull_request events targeting any base branch instead of only main, with comments documenting support for stacked and queued pull requests.

Changes

CI trigger coverage

Layer / File(s)	Summary
Broaden pull request trigger .github/workflows/test.yml	Removes the main branch filter from the pull request trigger and documents why non-main target branches require CI execution.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the main change: the Test workflow now runs on pull requests targeting any base branch.
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 unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ci/test-run-on-all-pr-bases

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