ci: Migrate CI workflows to use Makefile targets.

[nedseb]

Description

Now that we have a Makefile with standardized targets (make lint, make test-mock, make test-examples, make ci), the CI workflows should use them instead of calling ruff/pytest directly.

Tasks

• Update .github/workflows/python-linter.yml to use make lint
• Update .github/workflows/tests.yml to use make test-mock and make test-examples
• Use pip install -e ".[dev,test]" instead of pip install -r tests/requirements-test.txt
• Remove tests/requirements-test.txt once no workflow references it
• Verify all CI checks pass after migration

Benefits

• Single source of truth for commands (Makefile)
• Consistency between local dev and CI
• Easier to add new CI steps (just add a make target)

Related

• PR tooling: Add Makefile and npm hooks for dev workflow. #229 — Makefile and npm hooks setup
• Issue tooling: Add Makefile for common development commands. #201 — Developer tooling

[semantic-release-updater]

🎉 This issue has been resolved in version 0.0.2 🎉

The release is available on GitHub release

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