Analyze test coverage with Pytest-cov and enforce coverage checks for new code

[uxabix]

We need to analyze the test coverage of the existing codebase with Pytest-cov and set up a process to verify test coverage for all new code changes.

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Requirements

Coverage Analysis

• Integrate pytest-cov into the test suite (update requirements.txt and pytest.ini as necessary).
• Run coverage analysis on the current codebase to identify untested code sections.
• Document current coverage metrics and highlight major gaps.

CI Integration

• Update CI pipelines (e.g., GitHub Actions, GitLab CI) to include coverage checks on every PR and commit.
• Optionally enforce or notify on minimum coverage thresholds (e.g., fail if coverage drops).
• Provide clear coverage feedback in PRs for reviewers.

Best Practices

• Encourage incremental addition of missing tests for uncovered areas.
• Ensure tests for newly added code always provide adequate coverage.
• Exclude configuration/migration files from coverage where applicable.

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Recommendations

• Minimum coverage: Start with a "report only" mode, then incrementally raise the enforcement threshold.
• Coverage reporting: Prefer both HTML and terminal reports for maximum developer convenience.

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Testing

• Confirm that running tests locally (pytest --cov) produces an accurate coverage report.
• Verify CI coverage check runs on PRs and reports results.
• Test that coverage enforcement works by introducing uncovered code in a PR.

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Definition of Done

• Pytest-cov integrated and functionally reporting coverage.
• All new code is covered by tests.
• Coverage status documented in CI and developer workflow.
• Gaps documented and plan created for addressing uncovered code.