update ci/cd, add test workflow

[theodore-s-beers]

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[Copilot]

Pull request overview

This PR updates GitHub Actions CI/CD by adding a Go test workflow and modernizing the existing release-tagging workflow configuration.

Changes:

• Added a new test workflow that runs go test ./... on PRs and on pushes to main.
• Updated the tag-release workflow triggers and permissions, and renamed the job to tag.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
.github/workflows/test.yml	Adds a CI workflow to run Go tests on PRs and main pushes.
.github/workflows/tag-release.yml	Updates the tag release workflow triggers/permissions and adjusts the job structure.

Comments suppressed due to low confidence (1)

.github/workflows/tag-release.yml:22

• The tag publishing step uses git push origin tag "$VERSION", which will fail because tag is treated as a refspec rather than a keyword. Push the created tag ref directly (e.g. git push origin "refs/tags/$VERSION" or git push origin "$VERSION").

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