Complete training workflow and acceptance hardening

backend/tests/test_timing_score.py

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+import pytest
+
+from app.domain.events import Metric
+from app.scoring.competency import radar
+from app.scoring.gost import GostResult
+from app.scoring.timing import time_credit
+
+
+@pytest.mark.parametrize(
+    ("elapsed_ms", "expected"),
+    [(0, 1.0), (90_000, 0.75), (180_000, 0.5), (360_000, 0.0), (400_000, 0.0),
+     (None, 0.0)],
+)
+def test_time_credit_reduces_linearly_against_the_norm(elapsed_ms, expected):
+    assert time_credit(elapsed_ms, 180_000) == expected
+
+
+def test_fractional_timing_credit_affects_total_and_competency_scores():
+    metric = Metric(
+        key="card_fill_time", title="Время заполнения карточки", fact="90 с",
+        norm="180 с", passed=True, weight=2.0, credit=0.75,
+    )
+    result = GostResult(metrics=[metric])
+    assert result.score == 75.0
+    assert radar([metric])[0].value == 0.75