feat: 03 event system and plugin architecture

[github-actions]

Automated PR created from branch feat/03-event-system-and-plugin-architecture.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

[github-actions]

🤖 Jules Review

This PR successfully introduces an asynchronous event dispatcher and plugin architecture. However, there are a few important concurrency issues to address: a potential data race if plugins are registered dynamically, a risk of panics on shutdown if late events are dispatched, and a redundant select statement in the Dispatch method.

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Session: 8523969336520584104

[github-actions]

🤖 Jules Review

This diff adds go/coverage.html to .gitignore and adds minor test coverage for double shutdown and dispatch after shutdown in dispatcher_test.go.

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Session: 12880350892298517893

[github-actions]

🤖 Jules Review

This PR safely coordinates the closing of eventCh during shutdown by introducing an activeSends WaitGroup, preventing 'send on closed channel' panics from concurrent dispatches.

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Session: 7279296310250051576

[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

🤖 Jules Review

This PR adds a single newline at the end of the README.md file. No significant code changes were found.

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Session: 15998588305470389761