chore: update deps and workflow actions

[matthewmcneely]

Description

• Updated go.mod to resolve vulnerabilities
• Updated workflow action to include new API tests

Checklist

• Code compiles correctly and linting passes locally

[Copilot]

Pull Request Overview

This PR updates dependencies to resolve vulnerabilities and adjusts workflow actions to include new API tests.

• Updated go.mod dependencies and workflow actions.
• Added a call to reset the singleton state in tests and introduced a helper function ResetSingleton.

Reviewed Changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated no comments.

File	Description
util_test.go	Added mg.ResetSingleton() to reset singleton state.
unit_test/conn_test.go	Renamed test function and replaced print statements with require checks.
engine.go	Updated error messaging and added ResetSingleton helper function for testing.
.github/workflows/ci-go-unit-tests.yaml	Modified go test command to include additional API tests.

Files not reviewed (1)

• go.mod: Language not supported

Comments suppressed due to low confidence (1)

unit_test/conn_test.go:28

• [nitpick] The test function name 'TestRDF' is ambiguous; consider renaming it to better reflect its purpose, similar to the previous more descriptive name.

func TestRDF(t *testing.T) {