test: do not scan the built copy of the package for German

[Xerolux]

The language-policy test from #48 failed the 0.0.38 release job. Not a false alarm about the code — a defect in the test.

What happened

The test exempts the controller's German error strings in const_api.py — they reproduce what the hardware reports, so translating them would break the match. The exemption was keyed to the path:

CONTROLLER_VERBATIM = (PACKAGE / "const_api.py", REPO / "tests" / "mock_server.py")

The release job runs python -m build before the checks, and that copies the whole package into build/lib/. The copy is a different path, so the exemption did not cover it:

FAILED tests/test_language_policy.py::test_python_sources_are_english[const_api.py]
  build/lib/violet_poolcontroller_api/const_api.py:424: "Filterpumpen-Frostschutz nicht verfügbar - Sensorfehler"
  build/lib/violet_poolcontroller_api/const_api.py:456: "OmniTronic gibt keine Positionsrückmeldung (Rückspülen)"
  … 14 strings that are deliberately German
1 failed, 263 passed

Prepare stable release draft failed, and the publish jobs were skipped. No release was produced.

The fix

• Exemptions are matched by file name, so a copy of const_api.py is exempt wherever it sits.
• Generated directories are skipped outright: build, dist, .tox, .venv, venv, __pycache__ and *.egg-info. A built wheel is not source — what it contains says nothing about what is written in this repository.

Verification

Checked against the scenario that actually failed, not in the abstract:

python -m build --wheel      →  build/lib/violet_poolcontroller_api/ present
python -m pytest tests/ -q   →  250 passed
python -m ruff check .       →  All checks passed

A new test — test_generated_copies_are_not_scanned — asserts the built copy is never in the scanned set, so this cannot come back silently.

And the guard still catches what it is for: appending # Dieser Kommentar sollte nicht durchgehen to readings.py gives

FAILED tests/test_language_policy.py::test_python_sources_are_english[readings.py]

Once this is in, 0.0.38 can be released.

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Generated by Claude Code