fix: canonicalize score brackets and assessments

backtesting/engine.py

@@ -7,6 +7,8 @@ import sys
 from collections import defaultdict
 from datetime import datetime, timedelta
 
+from scoring.policy import SCORE_BRACKETS, SCORE_VERSION, score_in_bracket
+
 log = logging.getLogger(__name__)
 
 BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
@@ -16,14 +18,7 @@ HISTORY_PATH = os.path.join(BASE_DIR, "data", "history.json")
 CACHE_PATH = os.path.join(BASE_DIR, "data", "cache.json")
 
 # Score brackets matching the dashboard assessment levels
-BRACKETS = [
-    (0, 20, "Extreme Caution"),
-    (21, 40, "Caution"),
-    (41, 55, "Neutral"),
-    (56, 70, "Moderate Opportunity"),
-    (71, 85, "Strong Accumulation"),
-    (86, 100, "Extreme Accumulation"),
-]
+BRACKETS = SCORE_BRACKETS
 
 # Scoring thresholds — load from config/thresholds.json (single source of truth)
 import os as _os
@@ -322,7 +317,7 @@ def run_backtest(ml_mode=False):
     # --- Bracket statistics ---
     bracket_stats = []
     for low, high, label in BRACKETS:
-        days_in = [d for d in daily_scores if low <= d["score"] <= high]
+        days_in = [d for d in daily_scores if score_in_bracket(d["score"], (low, high, label))]
         if not days_in:
             bracket_stats.append({
                 "range": f"{low}-{high}", "label": label, "days": 0,
@@ -506,6 +501,7 @@ def run_backtest(ml_mode=False):
         "current_context": current_context,
         "chart_data": chart_data,
         "ml_mode": ml_mode,
+        "score_version": SCORE_VERSION,
         "computed_at": datetime.utcnow().isoformat() + "Z",
     }