Bump browser-harness to 0.1.9

[gregpr07]

Release browser-harness 0.1.9 after #618.

Verification:

• uv run --with pytest pytest -q — 140 passed
• uv build — sdist and wheel built
• git diff --check — passed

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Summary by cubic

Release browser-harness 0.1.9 by bumping the package version from 0.1.8 to 0.1.9. This prepares the package for publishing; no code behavior changes in this diff.

Rollout

• Tag v0.1.9 and publish to PyPI.
• Update internal pins to browser-harness==0.1.9 where needed.

Verification

• 140 tests passed; sdist and wheel built; whitespace check clean.

^{Written for commit bbb0177. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 1 file

_{Re-trigger cubic}