Merge branch 'download-artifact' resolving test workflow conflicts

Resolved conflicts in .github/workflows/tests.yml:
- Kept actions/setup-python@v5 (more standard than conda setup)
- Kept flexible test result publishing condition (runner.os == 'Linux')

No breaking changes to source code - only test expansions and coverage.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: RoryBarnes