Execute full test suite and systematically fix any failures, ensuring code quality and functionality.
- Run test suite: Execute all tests in project, capture output/identify failures, check both unit and integration tests
- Analyze failures: Categorize by type (flaky, broken, new failures), prioritize fixes based on impact, check if failures related to recent changes
- Fix issues systematically: Start with most critical failures, fix one issue at a time, re-run tests after each fix, verify all tests pass