fix: use floor instead of round in CodeScene ratchet

round(9.8457, 2) → 9.85 which exceeds the actual score, causing
the threshold to be unreachable. Use math.floor to truncate instead:
9.8457 → 9.84, 9.3884 → 9.38.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.codescene-thresholds

@@ -1,2 +1,2 @@
-HOTSPOT_THRESHOLD=9.85
-AVERAGE_THRESHOLD=9.39
+HOTSPOT_THRESHOLD=9.84
+AVERAGE_THRESHOLD=9.38

.husky/pre-push

@@ -162,9 +162,11 @@ if failed:
     sys.exit(1)
 
 # Ratchet: update thresholds file if scores improved
+# Truncate (floor) to 2 decimals so the threshold never exceeds the actual score
+import math
 thresholds_file = '$THRESHOLDS_FILE'
-new_hotspot = max(hotspot_min, round(hotspot, 2))
-new_average = max(average_min, round(average, 2))
+new_hotspot = max(hotspot_min, math.floor(hotspot * 100) / 100)
+new_average = max(average_min, math.floor(average * 100) / 100)
 if new_hotspot > hotspot_min or new_average > average_min:
     with open(thresholds_file, 'w') as f:
         f.write(f'HOTSPOT_THRESHOLD={new_hotspot}\nAVERAGE_THRESHOLD={new_average}\n')