Improving Python coverage

Increase Python unit test coverage by ~0.2% through meaningful tests that add real value.

Be fully autonomous — Do NOT stop or pause to ask for confirmation. Keep iterating (analyze → implement → verify) until the 0.2% coverage target is reached. If you encounter ambiguities about what to test, make a reasonable choice and proceed.

Workflow

Step 1: Run tests with coverage

make python-tests  # ~3 min, creates .coverage file

Generate JSON report for analysis:

uv run coverage json -o coverage.json