Run builds for pull requests

[alexeichhorn]

• Problem: The Swift build matrix only runs for pushes to this repository, so pull requests from forks can appear ready to merge without compiling.
• Solution: Run the matrix for pull requests targeting main and limit push builds to main. The existing first-time-contributor approval policy keeps external workflow runs behind maintainer approval.

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Note

Overview

Pull request builds. Extends the Swift unit test workflow to run for pull requests targeting main, adding CI coverage before changes are merged.

Push scope. Restricts the existing push trigger to main, preserving builds for changes landing on the primary branch.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro Plus

Run ID: e3ff0472-585c-4bb7-8d41-0dbe4fb173ab

📥 Commits

Reviewing files that changed from the base of the PR and between 7cc8190 and d8671c6.

📒 Files selected for processing (1)

• .github/workflows/swift.yml

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📝 Walkthrough

Walkthrough

The Swift GitHub Actions workflow now runs for pushes to main and pull requests targeting main.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the primary change: running builds for pull requests.
Description check	✅ Passed	The description accurately explains the workflow changes and their purpose.
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/run-builds-on-pull-requests

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