github: GitHub Action workflows for OpenCode [no ci]

[shortthirdman]

🚀 Pull Request

📌 Summary

Add GitHub Actions workflows for OpenCode to automate validation, testing, and repository maintenance tasks, with CI execution intentionally excluded via [no ci].

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📑 Description

• Not Completed
• Completed

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🧩 Type of Change

• 🔬 Research / Experiment
• ✨ New feature
• 🐛 Bug fix
• ♻️ Refactor (no functional change)
• ⚡ Performance improvement
• 🛠️ Build / CI / Tooling change
• 🔐 Security fix
• 🧪 Test-only change
• 📚 Documentation update
• 🚢 Production release change

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🧪 Research vs Production Readiness

• This PR is research / experimental only
• This PR is production-ready
• This PR transitions research code toward production

Notes (if applicable):

N/A

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🧾 Conventional Commit Compliance

• PR title follows Conventional Commits
  • Examples:
    • feat(api): add rate limiting
    • fix(ci): resolve flaky pipeline
    • chore(deps): bump terraform provider
• Commit messages are clean, meaningful, and scoped
• No breaking changes OR breaking changes are documented below

⚠️ Breaking Changes (if any)

Describe the breaking change and required migration steps

No breaking changes inflicted.

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🔄 CI/CD & GitOps Checklist

• CI pipeline passes locally and in GitHub Actions
• Linting, formatting, and static analysis pass
• Tests added or updated (unit / integration / e2e)
• No secrets, credentials, or tokens committed
• Versioning handled only via semantic-release (no manual bumps)
• GitOps manifests updated (if applicable)
• Rollback strategy considered

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✅ Checks

• My pull request adheres to the code style of this project
• My code requires changes to the documentation
• I have updated the documentation as required
• All the tests have passed

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🏗️ Infrastructure / Deployment Impact

• No infrastructure changes
• Kubernetes / Helm / Argo / Flux changes
• Terraform / Cloud resource changes
• Environment variables or secrets updated

Details:

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🧪 Testing Strategy

• Unit tests
• Integration tests
• End-to-end tests
• Manual testing performed

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📊 Observability & Ops Readiness

• Logging updated (if applicable)
• Metrics / alerts added or updated
• Dashboards validated
• Error handling reviewed

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🔐 Security & Compliance

• Security impact reviewed
• Dependency scan passed
• No new high/critical vulnerabilities introduced
• Access control / RBAC reviewed (if applicable)

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📚 Documentation

• Code comments added/updated
• README / docs updated
• Runbooks or ADRs updated (if applicable)

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🔗 Related Issues / PRs

• Fixes #
• Related to #
• Closes #
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👀 Reviewer Notes

N/A

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ℹ Additional Information

N/A