Add CI with Codecov badges

[KristopherKubicki]

Summary

• add GitHub Actions workflow to run tests and upload coverage to Codecov
• create placeholder Python module and test
• display CI and coverage badges in README files
• trigger workflow on staging and main branches

Testing

• PYTHONPATH=. pytest tests/test_dummy.py -q
• PYTHONPATH=. pytest --cov=. --cov-report xml (fails: unrecognized arguments --cov)

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https://chatgpt.com/codex/tasks/task_e_68557f95e2148333806c63d0141b3cef

[Copilot]

Pull Request Overview

This PR sets up continuous integration with coverage reporting, adds a placeholder Python module and test, and surfaces CI and coverage status via badges in README files.

• Introduces a GitHub Actions workflow to run tests and upload coverage to Codecov.
• Adds dummy.py with an add function and a basic test in tests/test_dummy.py.
• Inserts CI and Codecov badges into README.md and profile/README.md.

Reviewed Changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/test_dummy.py	Adds a basic test for the new add function
dummy.py	Implements the add(a, b) function with a docstring
.github/workflows/ci.yml	Defines a CI workflow that installs dependencies, runs tests with coverage, and uploads to Codecov
README.md	Inserts CI and Codecov badges at the top of the main README
profile/README.md	Inserts CI and Codecov badges in the profile README

Comments suppressed due to low confidence (3)

.github/workflows/ci.yml:31

• The CI run step uses --cov but pytest-cov may not be installed by default, causing an error. Either include pytest-cov in requirements.txt or add pip install pytest-cov in the dependencies step before running pytest.

        run: pytest --cov=. --cov-report xml

tests/test_dummy.py:3

• [nitpick] This test only covers a single positive case. Consider adding additional cases (e.g., zero, negative values, floats) to improve test coverage and catch edge cases.

def test_add():