Add GitHub Actions CI workflow for testing

[abrichr]

Summary

Adds a GitHub Actions CI workflow (test.yml) for automated testing on pull requests and main branch pushes.

Changes

• New workflow: .github/workflows/test.yml

  • Runs tests on Python 3.10 and 3.11
  • Tests on both Ubuntu and macOS runners
  • Uses uv for fast dependency management
  • Runs pytest (115 tests)
  • Runs ruff linter and formatter checks (non-blocking)

• Code quality improvements: Fixed multiple ruff linting issues

  • Removed unused imports in example files
  • Removed unnecessary f-string prefixes
  • Fixed ambiguous variable names
  • Removed unused variable assignments

Test Plan

• All 115 pytest tests pass locally
• Workflow file syntax is valid
• CI workflow runs successfully on GitHub Actions (will verify after PR creation)

Notes

• Linting checks are set to continue-on-error: true to allow iteration on code quality without blocking CI
• Some Python 3.12 syntax issues remain in component files (f-string escaping) that will need separate fixes for full Python 3.10 compatibility
• The workflow follows the pattern used in other OpenAdapt repositories (openadapt-ml, OpenAdapt)

Co-Authored-By: Claude Sonnet 4.5 noreply@anthropic.com

[abrichr]

This PR has merge conflicts that need to be resolved. The CI workflow addition looks good and follows the pattern used in other OpenAdapt repositories.\n\nNext steps:\n1. Resolve merge conflicts with main branch\n2. Verify CI workflow runs successfully after resolving conflicts\n3. Consider addressing the Python 3.12 syntax issues mentioned in the PR description (f-string escaping)\n\nThis is recent work (Jan 17) and should be merged soon after conflicts are resolved.