docs: bring skills and docs in line with the fixed code

Skills ask before using a working copy found in the user's folder and state
its check level first. The drift of the queue models before the shock is
stated in the caveats and the README. README shows how to run the check and
the tests. The drift line names the month a gradual drive begins.

Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>

tests/test_scenario.py

@@ -570,3 +570,10 @@ def test_modell_uten_ko_har_ingen_driftlinje(fil: str, tmp_path: Path, capsys: p
     assert "Slik leses tallene: 1,00 er nivået i referanselikevekten før sjokket" in ut
     assert "Fram til måned" not in ut
     assert "nesten, men ikke helt" not in ut
+
+
+def test_gradvis_paadrag_begynner_for_forste_avvik(tmp_path: Path, capsys: pytest.CaptureFixture[str]) -> None:
+    kode, ut, _ = kjor_fil(NYE / "utvidelse_bolge.json", tmp_path / "ut", capsys)
+    assert kode == 0
+    assert "Fram til måned 12 har K gått fra 1,000 til 1,007" in ut
+    assert "måned 12,05" not in ut