fix: canonicalize score brackets and assessments

tests/test_score_policy.py

@@ -0,0 +1,38 @@
+import pytest
+
+from backtesting import engine as backtest_engine
+from ml import optimizer
+from scoring import engine as scoring_engine
+from scoring import policy
+
+
+def test_score_brackets_are_contiguous_and_shared_by_all_scoring_paths():
+    assert backtest_engine.BRACKETS is policy.SCORE_BRACKETS
+    assert optimizer.BRACKETS is policy.SCORE_BRACKETS
+
+    for left, right in zip(policy.SCORE_BRACKETS, policy.SCORE_BRACKETS[1:]):
+        assert left[1] == right[0]
+
+    for tenth in range(0, 1001):
+        score = tenth / 10
+        matches = [bracket for bracket in policy.SCORE_BRACKETS if policy.score_in_bracket(score, bracket)]
+        assert len(matches) == 1, f"score {score} matched {matches}"
+        assert policy.assessment_for_score(score) == matches[0][2]
+
+
+@pytest.mark.parametrize(
+    ("score", "assessment"),
+    [
+        (0, "EXTREME CAUTION"),
+        (19.999, "EXTREME CAUTION"),
+        (20, "CAUTION — OVERHEATED"),
+        (35, "NEUTRAL"),
+        (50, "MODERATE OPPORTUNITY"),
+        (65, "STRONG ACCUMULATION ZONE"),
+        (80, "EXTREME ACCUMULATION ZONE"),
+        (100, "EXTREME ACCUMULATION ZONE"),
+    ],
+)
+def test_assessment_boundaries_match_live_scoring(score, assessment):
+    assert policy.assessment_for_score(score) == assessment
+    assert scoring_engine.assessment_for_score(score) == assessment