[Enhancement]: CI matrix with skillware extra for reference-host tests

[rosspeili]

Area (optional)

ci / testing

Problem or use case

CI installs .[dev] only; real Skillware egress path (≥0.5.1) untested in automation. Reference host epic (GH 12) needs mock + live coverage.

Proposed behavior

Matrix job or second step: pip install -e ".[dev,skillware]" + pytest. Keep fast job without Skillware for forks.

Alternatives considered (optional)

Nightly-only workflow — acceptable if PR latency too high.

[rosspeili]

Closed via PR #42.

Shipped: skillware-live CI job (pip install -e ".[dev,skillware]", pytest tests/test_skillware_integration.py). Main matrix remains Skillware-free for fork speed. Documented in TESTING.md.