[devin-ai-integration]

Summary

This PR adds code coverage measurement for the AgentLab test suite. Changes include:

• Added coverage[toml]>=7.0 as a dev dependency in pyproject.toml
• Added coverage configuration in pyproject.toml to measure code in src/ while excluding test files and virtual environments
• Updated CI workflow to run tests with coverage and upload HTML reports as artifacts
• Added run-coverage and test-coverage Makefile targets for local coverage measurement
• Updated uv.lock to include the coverage dependency

Review & Testing Checklist for Human

• Download the coverage artifact from CI and confirm the HTML report is readable and shows expected coverage data for src/ directory
• Test locally with make run-coverage (after setting up miniwob) to confirm local coverage workflow works
• Verify the coverage report excludes test files and virtual environments as configured

Notes

The .gitignore already contained entries for coverage output files (htmlcov/, .coverage, .coverage.*), so no changes were needed there.

The CI workflow uses uv run python -m coverage to invoke coverage, which is the correct approach for uv-managed environments.

Link to Devin run: https://app.devin.ai/sessions/e7687644a2fd497894c556f314e79818
Requested by: shayan@cognition.ai

[devin-ai-integration]

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